<html>
<head>
<title>Form S-8</title>

</head>

<body bgcolor="#FFFFFF" text="#000000">
<div align="center">
  <p style="margin:1pt 0in 2pt;"><font face="Arial, Helvetica, sans-serif" size="2"><b>As
    filed with the Securities and Exchange Commission on February 22, 2008</b></font></p>
  <p style="margin:1pt 0in 2pt;" align="right"><b><font size="2" face="Arial, Helvetica, sans-serif">Registration
    No. 333-___</font></b></p>
  <hr noshade>
  <p style="margin:10pt 0in 2pt;"><font face="Arial, Helvetica, sans-serif" size="3"><b>UNITED
    STATES</b></font></p>
  <p style="margin:0pt 0in 2pt;"><font face="Arial, Helvetica, sans-serif" size="3"><b>SECURITIES
    AND EXCHANGE COMMISSION</b></font></p>
  <p style="margin:0in 0in 10pt;"><font size="3" face="Arial, Helvetica, sans-serif">WASHINGTON,
    D.C. 20549</font></p>
  <hr noshade>
  <p style="margin:10pt 0in 10pt;"><font face="Arial, Helvetica, sans-serif"><b><font size="5">FORM
    S-8</font></b></font></p>
  <p style="margin:0in 0in 1pt;"><font face="Arial, Helvetica, sans-serif"><font size="2">REGISTRATION
    STATEMENT UNDER</font></font></p>
  <p style="margin:0in 0in 10pt;"><font size="2" face="Arial, Helvetica, sans-serif">THE
    SECURITIES ACT OF 1933</font></p>
  <p style="margin:0in 0in .0001pt;" align="center"><font face="Arial, Helvetica, sans-serif"><b><font size="5">TETRA
    TECHNOLOGIES, INC.</font></b></font></p>
  <p style="margin:0in 0in .0001pt;" align="center"><font face="Arial, Helvetica, sans-serif" size="2"><em>(Exact
    name of registrant as specified in its charter)</em></font></p>
  <p style="margin:0in 0in .0001pt;" align="center">&nbsp;</p>
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr valign="bottom">
      <td width="40%">
        <div align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">Delaware</font></strong></div></td>
      <td width="20%">
        <div align="center"></div></td>
      <td width="40%">
        <div align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">74-2148293</font></strong></div></td>
    </tr>
    <tr valign="top">
      <td width="40%">
        <div align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><em>(State
          or other jurisdiction of incorporation or organization)</em></font></font></div></td>
      <td width="20%">
        <div align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"></font></font></div></td>
      <td width="40%">
        <div align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><em>(I.R.S.
          Employer Identification No.)</em></font></font></div></td>
    </tr>
  </table>
  <p style="margin:0in 0in .0001pt;" align="center">&nbsp;</p>
  <p style="margin:0in 0in .0001pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">25025
    Interstate 45 North, Suite 600</font></strong></p>
  <p style="margin:0in 0in .0001pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">The
    Woodlands, Texas 77380</font></strong></p>
  <p style="margin:0in 0in .0001pt;" align="center"><font size="2" face="Arial, Helvetica, sans-serif"><em>(Address
    of Principal Executive Offices) (Zip Code)</em></font></p>
  <p style="margin:0in 0in .0001pt;" align="center">&nbsp;</p>
  <p style="margin:0in 0in .0001pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">TETRA
    TECHNOLOGIES, INC.</font></strong></p>
  <p style="margin:0in 0in .0001pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">401(k)
    RETIREMENT PLAN</font></strong></p>
  <p style="margin:0in 0in 10pt;" align="center"><font size="2" face="Arial, Helvetica, sans-serif"><em>(Full
    title of the plan)</em></font></p>
  <p style="margin:0in 0in 1pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">Bass
    C. Wallace, Jr.</font></strong></p>
  <p style="margin:0in 0in 1pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">General
    Counsel </font></strong></p>
  <p style="margin:0in 0in 1pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">25025
    Interstate 45 North, Suite 600</font></strong></p>
  <p style="margin:0in 0in 1pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">The
    Woodlands, Texas 77380</font></strong></p>
  <p style="margin:0in 0in 10pt;" align="center"><font size="2" face="Arial, Helvetica, sans-serif"><em>(Name
    and address of agent for service)</em></font></p>
  <p style="margin:0in 0in 1pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">(281)
    367-1983</font></strong></p>
  <p style="margin:0in 0in 10pt;" align="center"><font size="2" face="Arial, Helvetica, sans-serif"><em>(Telephone
    number, including area code, of agent for service)</em></font></p>
  <p style="margin:0in 0in 1pt;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">Indicate
    by check mark whether the registrant is a large accelerated filer, an accelerated
    filer, a non-accelerated filer, or a smaller reporting company. See the definitions
    of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer&#8221;
    and &#8220;smaller reporting company&#8221; in Rule 12b-2 of the Exchange
    Act. (Check one): </font></p>
  <p style="margin:0in 0in 5pt;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">Large
    accelerated filer [&nbsp;X ] Accelerated filer [&nbsp; ] Non-accelerated filer
    [&nbsp; ] Smaller reporting company [&nbsp; ]</font></p>

  <p style="margin:0in 0in 10pt;" align="center"><font size="2" face="Arial, Helvetica, sans-serif">(Do
    not check if a smaller reporting company) </font></p>
  <p style="margin:10pt 0in 10pt;" align="center"><font size="2" face="Arial, Helvetica, sans-serif"><strong>CALCULATION
    OF REGISTRATION FEE</strong></font></p>
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr valign="bottom">
      <td width="28%" style="border:none;border-bottom:solid windowtext .5pt;border-top:double windowtext 1.5pt;border-right:solid windowtext .5pt;">
        <p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><b>Title
          of securities to be registered</b><font size="1">(1)</font></font></font></p></td>
      <td width="18%" style="border:none;border-bottom:solid windowtext .5pt;border-top:double windowtext 1.5pt;border-right:solid windowtext .5pt;">
        <p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><b>Amount
          to be registered <font size="1">(2)</font></b></font></font></p></td>
      <td width="18%" style="border:none;border-bottom:solid windowtext .5pt;border-top:double windowtext 1.5pt;border-right:solid windowtext .5pt;">
        <p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><b>Proposed
          maximum offering price per share <font size="1">(3)</font></b></font></font></p></td>
      <td width="18%" style="border:none;border-bottom:solid windowtext .5pt;border-top:double windowtext 1.5pt;border-right:solid windowtext .5pt;">
        <p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><b>Proposed
          maximum aggregate offering price <font size="1">(3)</font></b></font></font></p></td>
      <td width="18%" style="border:none;border-bottom:solid windowtext .5pt;border-top:double windowtext 1.5pt;">
        <p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><b>Amount
          of registration fee</b></font></font></p></td>
    </tr>
    <tr valign="middle">
      <td width="28%" style="border:none;border-bottom:double windowtext 1.5pt;border-right:solid windowtext .5pt;">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Common
          Stock, par value $0.01 per share <font size="1">(4)</font></font></td>
      <td width="18%" style="border:none;border-bottom:double windowtext 1.5pt;border-right:solid windowtext .5pt;"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">400,000
          shares </font></td>
      <td width="18%" style="border:none;border-bottom:double windowtext 1.5pt;border-right:solid windowtext .5pt;"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">$18.50</font></td>
      <td width="18%" style="border:none;border-bottom:double windowtext 1.5pt;border-right:solid windowtext .5pt;"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">$7,400,000</font></td>
      <td width="18%" style="border:none;border-bottom:double windowtext 1.5pt;"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">$290.82</font></td>
    </tr>
  </table>
  <p style="margin:5pt 0in 1pt;" align="left"><font size="1" face="Arial, Helvetica, sans-serif">(1)
    In addition, pursuant to Rule 416(c) under the Securities Act of 1933, this
    registration statement also covers an indeterminate amount of interests to
    be offered and sold pursuant to the employee benefit plan described herein.</font></p>
  <p style="margin:0in 0in 1pt;" align="left"><font size="1" face="Arial, Helvetica, sans-serif">(2)
    Pursuant to Rule 416(a) under the Securities Act of 1933, as amended, the
    number of shares of common stock registered herein includes an indeterminate
    number of additional shares that may be issued with respect to the securities
    registered hereunder by reason of stock dividends, spin-offs, extraordinary
    dividends, stock splits, combinations of shares, recapitalizations, mergers,
    consolidations, reorganizations or similar transactions.</font></p>
  <p style="margin:0in 0in 1pt;" align="left"><font size="1" face="Arial, Helvetica, sans-serif">(3)
    Estimated solely for the purpose of calculating the registration fee in accordance
    with Rule 457(c) and (h) under the Securities Act of 1933, as amended, and
    based upon the average of the high and low sales prices of the Registrant&#8217;s
    common stock on The New York Stock Exchange on February 21, 2008.</font></p>
  <p style="margin:0in 0in 1pt;" align="left"><font size="1" face="Arial, Helvetica, sans-serif">(4)
    Includes the preferred stock purchase rights (as adjusted and as subject to
    further adjustment upon certain events) associated with the common stock.</font></p>
  <p style="margin:2pt 0in 2pt;" align="center"><font size="1" face="Arial, Helvetica, sans-serif">&nbsp;</font></p>
  <hr noshade>
  <p align="center" style="page-break-before:always">
  <p style="margin:10pt 0in 10pt;" align="center"><b><font size="2" face="Arial, Helvetica, sans-serif">EXPLANATORY
    NOTE </font></b></p>
  <p style="margin:0pt 0in 10pt;text-indent:0.5in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">This
    Registration Statement on Form S-8 is filed by TETRA Technologies, Inc. (the
    &#8220;Company&#8221; or the &#8220;Registrant&#8221;) pursuant to General
    Instruction E to Form S-8. Registration Statement No. 33 41337 (the &#8220;1991
    Registration Statement&#8221;) previously registered 50,000 shares of the
    Company&#8217;s common stock, par value $0.01 per share (&#8220;Common Stock&#8221;)
    issuable under the TETRA Technologies, Inc. 401(k) Retirement Plan (the &#8220;401(k)
    Plan&#8221;), and Registration Statement No. 333 4284 (the &#8220;1996 Registration
    Statement&#8221;) previously registered an additional 100,000 shares of Common
    Stock issuable under the 401(k) Plan, in each case together with an indeterminate
    amount of interests in the 401(k) Plan. This Registration Statement is being
    filed to register an additional 400,000 shares of Common Stock that may be
    issued under the 401(k) Plan and includes an indeterminate amount of interests
    in the 401(k) Plan.</font></p>

  <p style="margin:0pt 0in 10pt;text-indent:0.5in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">
    This Registration Statement relates to securities of the same class as those
    to which the 1991 Registration Statement and the 1996 Registration Statement
    (collectively, the &#8220;Prior Registration Statements&#8221;) relate, and
    is submitted in accordance with General Instruction E to Form S-8 regarding
    Registration of Additional Securities. Pursuant to General Instruction E of
    Form S-8, the contents of the Prior Registration Statements are, except as
    otherwise set forth in this Registration Statement, incorporated herein by
    reference. </font></p>

  <p style="margin:0pt 0in 10pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">PART
    II</font></strong></p>
  <p style="margin:0pt 0in 10pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">INFORMATION
    REQUIRED IN THE REGISTRATION STATEMENT</font></strong></p>
  <p align="left" style="margin:0pt 0in 10pt;"><font size="2" face="Arial, Helvetica, sans-serif"><strong>Item
    3. INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE</strong></font></p>
  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">The
    following documents, which have been previously filed with the Securities
    and Exchange Commission (the &#8220;SEC&#8221;) by the Company or the 401(k)
    Plan, as specified, are incorporated herein by reference into the Registration
    Statement:</font></p>

  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">(a)
    The Company&#8217;s Annual Report on Form 10-K for the fiscal year ended December
    31, 2006 as filed with the SEC on March 1, 2007 (File No. 001-13455);</font></p>
  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">(b)
    The Company&#8217;s Quarterly Report on Form 10-Q for the quarterly period
    ended March 31, 2007, filed by the Company with the SEC on May 10, 2007 (File
    No. 001-13455); </font></p>

  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">
    (c) The Company&#8217;s Quarterly Report on Form 10-Q for the quarterly period
    ended June 30, 2007, filed by the Company with the SEC on August 9, 2007 (File
    No. 001-13455); </font></p>

  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">
    (d) The Company&#8217;s Quarterly Report on Form 10-Q for the quarterly period
    ended September 30, 2007, filed by the Company with the SEC on November 9,
    2007 (File No. 001-13455);</font></p>

  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">(e)
    The Company&#8217;s Current Reports on Form 8-K as filed by the Company with
    the SEC on January 10, 2007; May 8, 2007; August 8, 2007; November 6, 2007;
    January 14, 2008; and February 6, 2008 (File No. 001-13455);</font></p>

  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">
    (f) The description of the Common Stock contained in the Company&#8217;s Registration
    Statement on Form 8-A filed with the SEC on October 7, 1997 (File No. 001-13455),
    including any amendments and reports filed for the purpose of updating such
    description;</font></p>

  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">
    (g) The description of the Company&#8217;s Series One Junior Participating
    Preferred Stock contained in the Company&#8217;s Registration Statement on
    Form 8-A (File No. 01-13455) filed with the SEC on October 28, 1998, including
    any subsequent amendments or reports filed for the purpose of updating such
    description; and</font></p>

  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">
    (h) The 401(k) Plan&#8217;s Annual Report on Form 11-K for the fiscal year
    ended December 31, 2006 filed June 22, 2007 (File No. 001-13456). </font></p>

  <p style="margin:2pt 0in 2pt;" align="center"><font size="1" face="Arial, Helvetica, sans-serif">-2-</font></p>
  <hr noshade>
  <p align="center" style="page-break-before:always">
  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">All
    documents filed by the Company or the 401(k) Plan pursuant to Sections 13(a),
    13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended (the
    &#8220;Exchange Act&#8221;), subsequent to the date of this Registration Statement
    and prior to the filing of a post-effective amendment which indicates that
    all securities offered hereby have been sold or which deregisters all securities
    remaining unsold, shall be deemed to be incorporated by reference herein and
    to be a part hereof from the date of the filing of such documents.</font></p>
    <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">Any statement contained in a document incorporated or deemed incorporated
    by reference in this Registration Statement shall be deemed to be modified
    or superseded for purposes of this Registration Statement to the extent that
    a statement contained in this Registration Statement or in any other subsequently
    filed document which also is incorporated or deemed to be incorporated by
    reference in this Registration Statement modifies or supersedes such statement.
    Any such statement so modified or superseded shall not be deemed, except as
    modified or superseded, to constitute a part of this Registration Statement.
    </font></p>
   <p align="left" style="margin:0pt 0in 10pt;"><font size="2" face="Arial, Helvetica, sans-serif">
    <strong>Item 8. EXHIBITS</strong></font></p>
  <p align="left" style="margin:0pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">
    The following exhibits have been filed as part of this Registration Statement
    and are specifically incorporated by reference:</font></p>
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td width="18%" style="border:none;border-bottom:solid windowtext .5pt">
        <div align="center"><font size="2" face="Arial, Helvetica, sans-serif">Exhibit
          No.</font></div></td>
      <td width="2%"> <div align="center"><font size="2" face="Arial, Helvetica, sans-serif"></font></div></td>
      <td width="80%" style="border:none;border-bottom:solid windowtext .5pt">
        <div align="center"><font size="2" face="Arial, Helvetica, sans-serif">Description</font></div></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.1</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Restated
          Certificate of Incorporation of TETRA Technologies, Inc. (incorporated
          by reference to Exhibit 3.1 to the Company's Registration Statement
          on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.2</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 3.1 to the Company's Registration
          Statement on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.3</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 3.1(ii) to the Company's
          Annual Report on Form 10-K for the year ended December 31, 2003 filed
          on March 15, 2004 (SEC File No. 001-13455)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.4</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 4.4 to the Company's Registration
          Statement on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.5</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc (incorporated by reference to Exhibit 4.5 to the Company&#8217;s
          Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No.
          333-133790)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.6</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Amended
          and Restated Bylaws of TETRA Technologies, Inc. (incorporated by reference
          to Exhibit 4.6 to the Company&#8217;s Registration Statement on Form
          S-8 filed on May 4, 2006 (SEC File No. 333-133790)). </font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.7</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Designation of Series One Junior Participating Preferred Stock of
          the Company, dated October 27, 1998 (incorporated by reference to Exhibit
          2 to the Company&#8217;s Registration Statement on Form 8-A filed on
          October 28, 1998 (SEC File No. 001-13455)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.8</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Rights
          Agreement, dated as of October 26, 1998, between the Company and Harris
          Trust and Savings Bank (predecessor to Computershare Investor Services
          LLC), as Rights Agent (incorporated by reference to Exhibit 1 to the
          Company&#8217;s Registration Statement on Form 8-A filed on October
          28, 1998 (SEC File No. 001-13455)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.9</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Specimen
          Common Stock Certificate of the Company (incorporated by reference to
          Exhibit 4.1 to the Company&#8217;s Registration Statement on Form S-1
          filed on February 23, 1990 (SEC File No. 33-33586)).</font></td>
    </tr>
  </table>
  <p style="margin:10pt 0in 10pt;text-indent:0.5in;" align="left">&nbsp;</p>
  <p style="margin:2pt 0in 2pt;" align="center"><font size="1" face="Arial, Helvetica, sans-serif">-3-</font></p>
  <hr noshade>
  <p align="center" style="page-break-before:always">
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
      <td width="18%" style="border:none;border-bottom:solid windowtext .5pt">
        <div align="center"><font size="2" face="Arial, Helvetica, sans-serif">Exhibit
          No.</font></div></td>
      <td width="2%"> <div align="center"><font size="2" face="Arial, Helvetica, sans-serif"></font></div></td>
      <td width="80%" style="border:none;border-bottom:solid windowtext .5pt">
        <div align="center"><font size="2" face="Arial, Helvetica, sans-serif">Description</font></div></td>
    </tr>
  <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.10</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Form
          of Certificate of Designation for the Preferred Stock (incorporated
          by reference to Exhibit 4.9 to the Company&#8217;s Registration Statement
          on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).</font></td>
    </tr>
	<tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.11</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Specimen
          Preferred Stock Certificate of the Company (incorporated by reference
          to Exhibit 4.10 to the Company&#8217;s Registration Statement on Form
          S-4 filed on May 25, 2004 (SEC File No. 333-115859)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">5.1*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Opinion
          letter, dated February 27, 2002, issued by the Internal Revenue Service
          to T Rowe Price Trust Co., the prototype plan sponsor of the form of
          plan document used for the TETRA Technologies, Inc. 401(k) Retirement
          Plan, as amended and restated.</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">23.1*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Consent
          of Ernst &amp; Young LLP.</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">23.2*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Consent
          of Ryder Scott Company, L.P.</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">24.1*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Powers
          of Attorney (included on signature page).</font></td>
    </tr>
	<tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">99.1*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">TETRA
          Technologies, Inc. 401(k) Retirement Plan, as amended and restated.</font></td>
    </tr>
  </table>
  <hr align="left" width="20%" noshade>

  <p style="margin:1pt 0in 10pt;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">*
    Filed herewith.</font></p>
  <p style="margin:2pt 0in 2pt;" align="center"><font size="1" face="Arial, Helvetica, sans-serif">-4-</font></p>
  <hr noshade>
  <p align="left" style="page-break-before:always">
  <p style="margin:10pt 0in 10pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">SIGNATURES</font></strong></p>
  <p style="margin:10pt 0in 10pt;text-indent:.5in;" align="justify"><font size="2" face="Arial, Helvetica, sans-serif"><strong>The
    Registrant.</strong> Pursuant to the requirements of the Securities Act of
    1933, the registrant certifies that it has reasonable grounds to believe that
    it meets all of the requirements for filing on Form S-8 and has duly caused
    this registration statement to be signed on its behalf by the undersigned,
    thereunto duly authorized, in the City of The Woodlands, State of Texas, on
    this 22nd day of February, 2008.</font></p>
  <p style="margin:10pt 0in 10pt;text-indent:4in;" align="left"><strong><font size="2" face="Arial, Helvetica, sans-serif">TETRA
    TECHNOLOGIES, INC.</font></strong></p>
  <p style="margin:0pt 0in 1pt;text-indent:4in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">By:
    <u>/s/Geoffrey M. Hertel</u></font></p>
  <p style="margin:0pt 0in 1pt;text-indent:4in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">Name:
    Geoffrey M. Hertel</font></p>
  <p style="margin:0pt 0in 10pt;text-indent:4in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">Title:
    President &amp; Chief Executive Officer</font></p>
  <p style="margin:0pt 0in 10pt;" align="left">&nbsp;</p>
  <p style="margin:0pt 0in 10pt;" align="left">&nbsp;</p>
  <p style="margin:2pt 0in 2pt;" align="center"><font size="1" face="Arial, Helvetica, sans-serif">-5-</font></p>
  <hr noshade>
  <p align="center" style="page-break-before:always">
  <p align="center" style="margin:10pt 0in 10pt;"><font size="2" face="Arial, Helvetica, sans-serif"><strong>POWER
    OF ATTORNEY</strong></font></p>
  <p align="left" style="margin:10pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">KNOW
    ALL MEN BY THESE PRESENTS, that each of the undersigned officers and directors
    of the registrant hereby constitutes and appoints Geoffrey M. Hertel and Bass
    C. Wallace, Jr., and each of them severally, his lawful attorney-in-fact and
    agent, with full power of substitution and resubstitution, for him and on
    his behalf and in his name, place and stead, in any and all capacities, to
    sign, execute and file this registration statement under the Securities Act
    of 1933, as amended, and any and all amendments (including, without limitation,
    post-effective amendments), with all exhibits and any and all documents required
    to be filed with respect thereto, with the Securities and Exchange Commission
    or any regulatory authority, granting unto such attorneys-in-fact and agents
    full power and authority to do and perform each and every act and thing requisite
    and necessary to be done in and about the premises in order to effectuate
    the same, as fully to all intents and purposes as he himself might or could
    do, if personally present, hereby ratifying and confirming all that said attorneys-in-fact
    and agents or his substitute or substitutes, may lawfully do or cause to be
    done.</font></p>

  <p align="left" style="margin:10pt 0in 10pt;text-indent:0.5in;"><font size="2" face="Arial, Helvetica, sans-serif">
    Pursuant to the requirements of the Securities Act of 1933, this registration
    statement has been signed by the following persons in the capacities and on
    the dates stated.</font></p>
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2">Name
          and Signature</font></font></p></td>
      <td width="2%"><p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><b></b></font></font></p></td>
      <td width="50%" style="border:none;border-bottom:solid windowtext .5pt">
        <p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2">Title</font></font></p></td>
      <td width="2%"><p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2"><b></b></font></font></p></td>
      <td width="20%" style="border:none;border-bottom:solid windowtext .5pt">
        <p align="center"><font face="Arial, Helvetica, sans-serif"><font size="2">Date</font></font></p></td>
    </tr>
    <tr>
      <td width="26%">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/Geoffrey
          M. Hertel</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">President,
          Chief Executive Officer and Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Geoffrey
          M. Hertel</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">(Principal
          Executive Officer)</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/Joseph
          M. Abell, III</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Senior
          Vice President and Chief Financial Officer</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Joseph
          M. Abell, III</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">(Principal
          Financial Officer)</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/Ben
          C. Chambers</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Vice
          President &#150; Accounting</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Ben
          C. Chambers</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">(Principal
          Accounting Officer)</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/Ralph
          S. Cunningham</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Chairman
          of the Board of Directors and Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Ralph
          S. Cunningham</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Hoyt
          Ammidon, Jr.</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/Paul
          D. Coombs</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">
          Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Paul
          D. Coombs</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">/s/Tom
          H. Delimitros</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Tom
          H. Delimitros</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/Allen
          T. McInnes</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Allen
          T. McInnes</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/Kenneth
          P. Mitchell</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Kenneth
          P. Mitchell</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
	 <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/William
          D. Sullivan</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">William
          D. Sullivan</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
    <tr>
      <td width="26%" style="border:none;border-bottom:solid windowtext .5pt">
        <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">/s/Kenneth
          E. White, Jr.</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Director</font></td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">February
          22, 2008</font></td>
    </tr>
    <tr>
      <td width="26%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">Kenneth
          E. White, Jr.</font></td>
      <td width="2%">&nbsp;</td>
      <td width="50%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
      <td width="2%">&nbsp;</td>
      <td width="20%"> <p align="center" style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt">&nbsp;</td>
    </tr>
  </table>
  <p style="margin:2pt 0in 2pt;" align="center"><font size="1" face="Arial, Helvetica, sans-serif">-6-</font></p>
  <hr noshade>
  <p align="left" style="page-break-before:always">
  <p style="margin:10pt 0in 10pt;" align="center"><strong><font size="2" face="Arial, Helvetica, sans-serif">SIGNATURES</font></strong></p>
  <p style="margin:10pt 0in 10pt;text-indent:.5in;" align="justify"><font size="2" face="Arial, Helvetica, sans-serif"><strong>The
    Plan.</strong> Pursuant to the requirements of the Securities Act of 1933,
    the trustees (or other persons who administer the employee benefit plan) have
    duly caused this registration statement to be signed on its behalf by the
    undersigned, thereunto duly authorized, in the City of The Woodlands, State
    of Texas, on this 22nd day of February, 2008.</font></p>
  <p style="margin:10pt 0in 1pt;text-indent:4in;" align="left"><strong><font size="2" face="Arial, Helvetica, sans-serif">TETRA
    TECHNOLOGIES, INC.</font></strong></p>
  <p style="margin:0pt 0in 10pt;text-indent:4in;" align="left"><strong><font size="2" face="Arial, Helvetica, sans-serif">401(k)
    RETIREMENT PLAN</font></strong></p>
  <p style="margin:0pt 0in 1pt;text-indent:4in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">By:
    <u>/s/Geoffrey M. Hertel</u></font></p>
  <p style="margin:0pt 0in 1pt;text-indent:4in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">Name:
    Geoffrey M. Hertel</font></p>
  <p style="margin:0pt 0in 1pt;text-indent:4in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">Title:
    President &amp; Chief Executive Officer</font></p>
  <p style="margin:0pt 0in 10pt;text-indent:4in;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">
    TETRA Technologies, Inc.</font></p>
  <p style="margin:0pt 0in 10pt;" align="left">&nbsp;</p>
  <p style="margin:0pt 0in 10pt;" align="left">&nbsp;</p>
  <p style="margin:2pt 0in 2pt;" align="center"><font size="1" face="Arial, Helvetica, sans-serif">-7-</font></p>
  <hr noshade>
  <p align="center" style="page-break-before:always">
  <p align="center" style="margin:10pt 0in 10pt;"><font size="2" face="Arial, Helvetica, sans-serif"><strong>EXHIBIT
    INDEX </strong></font></p>

  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td width="18%" style="border:none;border-bottom:solid windowtext .5pt">
        <div align="center"><font size="2" face="Arial, Helvetica, sans-serif">Exhibit
          No.</font></div></td>
      <td width="2%"> <div align="center"><font size="2" face="Arial, Helvetica, sans-serif"></font></div></td>
      <td width="80%" style="border:none;border-bottom:solid windowtext .5pt">
        <div align="center"><font size="2" face="Arial, Helvetica, sans-serif">Description</font></div></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.1</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Restated
          Certificate of Incorporation of TETRA Technologies, Inc. (incorporated
          by reference to Exhibit 3.1 to the Company's Registration Statement
          on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.2</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 3.1 to the Company's Registration
          Statement on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.3</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 3.1(ii) to the Company's
          Annual Report on Form 10-K for the year ended December 31, 2003 filed
          on March 15, 2004 (SEC File No. 001-13455)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.4</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 4.4 to the Company's Registration
          Statement on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.5</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc (incorporated by reference to Exhibit 4.5 to the Company&#8217;s
          Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No.
          333-133790)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.6</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Amended
          and Restated Bylaws of TETRA Technologies, Inc. (incorporated by reference
          to Exhibit 4.6 to the Company&#8217;s Registration Statement on Form
          S-8 filed on May 4, 2006 (SEC File No. 333-133790)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.7</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Certificate
          of Designation of Series One Junior Participating Preferred Stock of
          the Company, dated October 27, 1998 (incorporated by reference to Exhibit
          2 to the Company&#8217;s Registration Statement on Form 8-A filed on
          October 28, 1998 (SEC File No. 001-13455)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.8</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Rights
          Agreement, dated as of October 26, 1998, between the Company and Harris
          Trust and Savings Bank (predecessor to Computershare Investor Services
          LLC), as Rights Agent (incorporated by reference to Exhibit 1 to the
          Company&#8217;s Registration Statement on Form 8-A filed on October
          28, 1998 (SEC File No. 001-13455)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.9</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Specimen
          Common Stock Certificate of the Company (incorporated by reference to
          Exhibit 4.1 to the Company&#8217;s Registration Statement on Form S-1
          filed on February 23, 1990 (SEC File No. 33-33586)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.10</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Form
          of Certificate of Designation for the Preferred Stock (incorporated
          by reference to Exhibit 4.9 to the Company&#8217;s Registration Statement
          on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">4.11</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Specimen
          Preferred Stock Certificate of the Company (incorporated by reference
          to Exhibit 4.10 to the Company&#8217;s Registration Statement on Form
          S-4 filed on May 25, 2004 (SEC File No. 333-115859)).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">5.1*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Opinion
          letter, dated February 27, 2002, issued by the Internal Revenue Service
          to T Rowe Price Trust Co., the prototype plan sponsor of the form of
          plan document used for the TETRA Technologies, Inc. 401(k) Retirement
          Plan, as amended and restated.</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">23.1*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Consent
          of Ernst &amp; Young LLP.</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">23.2*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Consent
          of Ryder Scott Company, L.P.</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">24.1*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">Powers
          of Attorney (included on signature page).</font></td>
    </tr>
    <tr>
      <td width="18%" valign="top"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font face="Arial, Helvetica, sans-serif" size="2">99.1*</font></td>
      <td width="2%">&nbsp;</td>
      <td width="80%"> <p style="margin:0in 0in .0001pt 10pt;text-indent:-10.0pt"><font size="2" face="Arial, Helvetica, sans-serif">TETRA
          Technologies, Inc. 401(k) Retirement Plan, as amended and restated.</font></td>
    </tr>
  </table>
  <hr align="left" width="20%" noshade>

  <p style="margin:1pt 0in 10pt;" align="left"><font size="2" face="Arial, Helvetica, sans-serif">*
    Filed herewith.</font></p>
  <p style="margin:2pt 0in 2pt;" align="center"><font size="1" face="Arial, Helvetica, sans-serif">-8-</font></p>
  <hr noshade>
  <p style="margin:0in 0in 10pt;" align="left">&nbsp;</p>
  <p style="margin:0pt 0in 10pt;" align="right">&nbsp;</p>
</div>
  </body>
</html>
[{"type": "S-8", "sequence": "1", "filename": "ttis8401kplan.htm", "description": "FORM S-8", "secsgml_size_bytes": 63537}]
{"company-data": {"conformed-name": "TETRA TECHNOLOGIES INC", "cik": "0000844965", "assigned-sic": "2810", "irs-number": "742148293", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-149348", "film-number": "08636367"}, "business-address": {"street1": "25025 I-45N", "city": "THE WOODLANDS", "state": "TX", "zip": "77380", "phone": "2813671983"}, "mail-address": {"street1": "25025 I-45 NORTH", "city": "THE WOODLANDS", "state": "TX", "zip": "77380"}}
Form S-8
As
    filed with the Securities and Exchange Commission on February 22, 2008
Registration
    No. 333-___
UNITED
    STATES
SECURITIES
    AND EXCHANGE COMMISSION
WASHINGTON,
    D.C. 20549
FORM
    S-8
REGISTRATION
    STATEMENT UNDER
THE
    SECURITIES ACT OF 1933
TETRA
    TECHNOLOGIES, INC.
(Exact
    name of registrant as specified in its charter)
Delaware
74-2148293
(State
          or other jurisdiction of incorporation or organization)
(I.R.S.
          Employer Identification No.)
25025
    Interstate 45 North, Suite 600
The
    Woodlands, Texas 77380
(Address
    of Principal Executive Offices) (Zip Code)
TETRA
    TECHNOLOGIES, INC.
401(k)
    RETIREMENT PLAN
(Full
    title of the plan)
Bass
    C. Wallace, Jr.
General
    Counsel
25025
    Interstate 45 North, Suite 600
The
    Woodlands, Texas 77380
(Name
    and address of agent for service)
(281)
    367-1983
(Telephone
    number, including area code, of agent for service)
Indicate
    by check mark whether the registrant is a large accelerated filer, an accelerated
    filer, a non-accelerated filer, or a smaller reporting company. See the definitions
    of "large accelerated filer," "accelerated filer"
    and "smaller reporting company" in Rule 12b-2 of the Exchange
    Act. (Check one):
Large
    accelerated filer [ X ] Accelerated filer [  ] Non-accelerated filer
    [  ] Smaller reporting company [  ]
(Do
    not check if a smaller reporting company)
CALCULATION
    OF REGISTRATION FEE
Title
          of securities to be registered
(1)
Amount
          to be registered
(2)
Proposed
          maximum offering price per share
(3)
Proposed
          maximum aggregate offering price
(3)
Amount
          of registration fee
Common
          Stock, par value $0.01 per share
(4)
400,000
          shares
$18.50
$7,400,000
$290.82
(1)
    In addition, pursuant to Rule 416(c) under the Securities Act of 1933, this
    registration statement also covers an indeterminate amount of interests to
    be offered and sold pursuant to the employee benefit plan described herein.
(2)
    Pursuant to Rule 416(a) under the Securities Act of 1933, as amended, the
    number of shares of common stock registered herein includes an indeterminate
    number of additional shares that may be issued with respect to the securities
    registered hereunder by reason of stock dividends, spin-offs, extraordinary
    dividends, stock splits, combinations of shares, recapitalizations, mergers,
    consolidations, reorganizations or similar transactions.
(3)
    Estimated solely for the purpose of calculating the registration fee in accordance
    with Rule 457(c) and (h) under the Securities Act of 1933, as amended, and
    based upon the average of the high and low sales prices of the Registrant's
    common stock on The New York Stock Exchange on February 21, 2008.
(4)
    Includes the preferred stock purchase rights (as adjusted and as subject to
    further adjustment upon certain events) associated with the common stock.
EXPLANATORY
    NOTE
This
    Registration Statement on Form S-8 is filed by TETRA Technologies, Inc. (the
    "Company" or the "Registrant") pursuant to General
    Instruction E to Form S-8. Registration Statement No. 33 41337 (the "1991
    Registration Statement") previously registered 50,000 shares of the
    Company's common stock, par value $0.01 per share ("Common Stock")
    issuable under the TETRA Technologies, Inc. 401(k) Retirement Plan (the "401(k)
    Plan"), and Registration Statement No. 333 4284 (the "1996 Registration
    Statement") previously registered an additional 100,000 shares of Common
    Stock issuable under the 401(k) Plan, in each case together with an indeterminate
    amount of interests in the 401(k) Plan. This Registration Statement is being
    filed to register an additional 400,000 shares of Common Stock that may be
    issued under the 401(k) Plan and includes an indeterminate amount of interests
    in the 401(k) Plan.
This Registration Statement relates to securities of the same class as those
    to which the 1991 Registration Statement and the 1996 Registration Statement
    (collectively, the "Prior Registration Statements") relate, and
    is submitted in accordance with General Instruction E to Form S-8 regarding
    Registration of Additional Securities. Pursuant to General Instruction E of
    Form S-8, the contents of the Prior Registration Statements are, except as
    otherwise set forth in this Registration Statement, incorporated herein by
    reference.
PART
    II
INFORMATION
    REQUIRED IN THE REGISTRATION STATEMENT
Item
    3. INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
The
    following documents, which have been previously filed with the Securities
    and Exchange Commission (the "SEC") by the Company or the 401(k)
    Plan, as specified, are incorporated herein by reference into the Registration
    Statement:
(a)
    The Company's Annual Report on Form 10-K for the fiscal year ended December
    31, 2006 as filed with the SEC on March 1, 2007 (File No. 001-13455);
(b)
    The Company's Quarterly Report on Form 10-Q for the quarterly period
    ended March 31, 2007, filed by the Company with the SEC on May 10, 2007 (File
    No. 001-13455);
(c) The Company's Quarterly Report on Form 10-Q for the quarterly period
    ended June 30, 2007, filed by the Company with the SEC on August 9, 2007 (File
    No. 001-13455);
(d) The Company's Quarterly Report on Form 10-Q for the quarterly period
    ended September 30, 2007, filed by the Company with the SEC on November 9,
    2007 (File No. 001-13455);
(e)
    The Company's Current Reports on Form 8-K as filed by the Company with
    the SEC on January 10, 2007; May 8, 2007; August 8, 2007; November 6, 2007;
    January 14, 2008; and February 6, 2008 (File No. 001-13455);
(f) The description of the Common Stock contained in the Company's Registration
    Statement on Form 8-A filed with the SEC on October 7, 1997 (File No. 001-13455),
    including any amendments and reports filed for the purpose of updating such
    description;
(g) The description of the Company's Series One Junior Participating
    Preferred Stock contained in the Company's Registration Statement on
    Form 8-A (File No. 01-13455) filed with the SEC on October 28, 1998, including
    any subsequent amendments or reports filed for the purpose of updating such
    description; and
(h) The 401(k) Plan's Annual Report on Form 11-K for the fiscal year
    ended December 31, 2006 filed June 22, 2007 (File No. 001-13456).
-2-
All
    documents filed by the Company or the 401(k) Plan pursuant to Sections 13(a),
    13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended (the
    "Exchange Act"), subsequent to the date of this Registration Statement
    and prior to the filing of a post-effective amendment which indicates that
    all securities offered hereby have been sold or which deregisters all securities
    remaining unsold, shall be deemed to be incorporated by reference herein and
    to be a part hereof from the date of the filing of such documents.
Any statement contained in a document incorporated or deemed incorporated
    by reference in this Registration Statement shall be deemed to be modified
    or superseded for purposes of this Registration Statement to the extent that
    a statement contained in this Registration Statement or in any other subsequently
    filed document which also is incorporated or deemed to be incorporated by
    reference in this Registration Statement modifies or supersedes such statement.
    Any such statement so modified or superseded shall not be deemed, except as
    modified or superseded, to constitute a part of this Registration Statement.
Item 8. EXHIBITS
The following exhibits have been filed as part of this Registration Statement
    and are specifically incorporated by reference:
Exhibit
          No.
Description
4.1
Restated
          Certificate of Incorporation of TETRA Technologies, Inc. (incorporated
          by reference to Exhibit 3.1 to the Company's Registration Statement
          on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).
4.2
Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 3.1 to the Company's Registration
          Statement on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).
4.3
Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 3.1(ii) to the Company's
          Annual Report on Form 10-K for the year ended December 31, 2003 filed
          on March 15, 2004 (SEC File No. 001-13455)).
4.4
Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 4.4 to the Company's Registration
          Statement on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).
4.5
Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc (incorporated by reference to Exhibit 4.5 to the Company's
          Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No.
          333-133790)).
4.6
Amended
          and Restated Bylaws of TETRA Technologies, Inc. (incorporated by reference
          to Exhibit 4.6 to the Company's Registration Statement on Form
          S-8 filed on May 4, 2006 (SEC File No. 333-133790)).
4.7
Certificate
          of Designation of Series One Junior Participating Preferred Stock of
          the Company, dated October 27, 1998 (incorporated by reference to Exhibit
          2 to the Company's Registration Statement on Form 8-A filed on
          October 28, 1998 (SEC File No. 001-13455)).
4.8
Rights
          Agreement, dated as of October 26, 1998, between the Company and Harris
          Trust and Savings Bank (predecessor to Computershare Investor Services
          LLC), as Rights Agent (incorporated by reference to Exhibit 1 to the
          Company's Registration Statement on Form 8-A filed on October
          28, 1998 (SEC File No. 001-13455)).
4.9
Specimen
          Common Stock Certificate of the Company (incorporated by reference to
          Exhibit 4.1 to the Company's Registration Statement on Form S-1
          filed on February 23, 1990 (SEC File No. 33-33586)).
-3-
Exhibit
          No.
Description
4.10
Form
          of Certificate of Designation for the Preferred Stock (incorporated
          by reference to Exhibit 4.9 to the Company's Registration Statement
          on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).
4.11
Specimen
          Preferred Stock Certificate of the Company (incorporated by reference
          to Exhibit 4.10 to the Company's Registration Statement on Form
          S-4 filed on May 25, 2004 (SEC File No. 333-115859)).
5.1*
Opinion
          letter, dated February 27, 2002, issued by the Internal Revenue Service
          to T Rowe Price Trust Co., the prototype plan sponsor of the form of
          plan document used for the TETRA Technologies, Inc. 401(k) Retirement
          Plan, as amended and restated.
23.1*
Consent
          of Ernst & Young LLP.
23.2*
Consent
          of Ryder Scott Company, L.P.
24.1*
Powers
          of Attorney (included on signature page).
99.1*
TETRA
          Technologies, Inc. 401(k) Retirement Plan, as amended and restated.
*
    Filed herewith.
-4-
SIGNATURES
The
    Registrant.
Pursuant to the requirements of the Securities Act of
    1933, the registrant certifies that it has reasonable grounds to believe that
    it meets all of the requirements for filing on Form S-8 and has duly caused
    this registration statement to be signed on its behalf by the undersigned,
    thereunto duly authorized, in the City of The Woodlands, State of Texas, on
    this 22nd day of February, 2008.
TETRA
    TECHNOLOGIES, INC.
By:
/s/Geoffrey M. Hertel
Name:
    Geoffrey M. Hertel
Title:
    President & Chief Executive Officer
-5-
POWER
    OF ATTORNEY
KNOW
    ALL MEN BY THESE PRESENTS, that each of the undersigned officers and directors
    of the registrant hereby constitutes and appoints Geoffrey M. Hertel and Bass
    C. Wallace, Jr., and each of them severally, his lawful attorney-in-fact and
    agent, with full power of substitution and resubstitution, for him and on
    his behalf and in his name, place and stead, in any and all capacities, to
    sign, execute and file this registration statement under the Securities Act
    of 1933, as amended, and any and all amendments (including, without limitation,
    post-effective amendments), with all exhibits and any and all documents required
    to be filed with respect thereto, with the Securities and Exchange Commission
    or any regulatory authority, granting unto such attorneys-in-fact and agents
    full power and authority to do and perform each and every act and thing requisite
    and necessary to be done in and about the premises in order to effectuate
    the same, as fully to all intents and purposes as he himself might or could
    do, if personally present, hereby ratifying and confirming all that said attorneys-in-fact
    and agents or his substitute or substitutes, may lawfully do or cause to be
    done.
Pursuant to the requirements of the Securities Act of 1933, this registration
    statement has been signed by the following persons in the capacities and on
    the dates stated.
Name
          and Signature
Title
Date
/s/Geoffrey
          M. Hertel
President,
          Chief Executive Officer and Director
February
          22, 2008
Geoffrey
          M. Hertel
(Principal
          Executive Officer)
/s/Joseph
          M. Abell, III
Senior
          Vice President and Chief Financial Officer
February
          22, 2008
Joseph
          M. Abell, III
(Principal
          Financial Officer)
/s/Ben
          C. Chambers
Vice
          President – Accounting
February
          22, 2008
Ben
          C. Chambers
(Principal
          Accounting Officer)
/s/Ralph
          S. Cunningham
Chairman
          of the Board of Directors and Director
February
          22, 2008
Ralph
          S. Cunningham
Director
February
          22, 2008
Hoyt
          Ammidon, Jr.
/s/Paul
          D. Coombs
Director
February
          22, 2008
Paul
          D. Coombs
/s/Tom
          H. Delimitros
Director
February
          22, 2008
Tom
          H. Delimitros
/s/Allen
          T. McInnes
Director
February
          22, 2008
Allen
          T. McInnes
/s/Kenneth
          P. Mitchell
Director
February
          22, 2008
Kenneth
          P. Mitchell
/s/William
          D. Sullivan
Director
February
          22, 2008
William
          D. Sullivan
/s/Kenneth
          E. White, Jr.
Director
February
          22, 2008
Kenneth
          E. White, Jr.
-6-
SIGNATURES
The
    Plan.
Pursuant to the requirements of the Securities Act of 1933,
    the trustees (or other persons who administer the employee benefit plan) have
    duly caused this registration statement to be signed on its behalf by the
    undersigned, thereunto duly authorized, in the City of The Woodlands, State
    of Texas, on this 22nd day of February, 2008.
TETRA
    TECHNOLOGIES, INC.
401(k)
    RETIREMENT PLAN
By:
/s/Geoffrey M. Hertel
Name:
    Geoffrey M. Hertel
Title:
    President & Chief Executive Officer
TETRA Technologies, Inc.
-7-
EXHIBIT
    INDEX
Exhibit
          No.
Description
4.1
Restated
          Certificate of Incorporation of TETRA Technologies, Inc. (incorporated
          by reference to Exhibit 3.1 to the Company's Registration Statement
          on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).
4.2
Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 3.1 to the Company's Registration
          Statement on Form S-4 filed on December 27, 1995 (SEC File No. 33-80881)).
4.3
Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 3.1(ii) to the Company's
          Annual Report on Form 10-K for the year ended December 31, 2003 filed
          on March 15, 2004 (SEC File No. 001-13455)).
4.4
Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc. (incorporated by reference to Exhibit 4.4 to the Company's Registration
          Statement on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).
4.5
Certificate
          of Amendment of Restated Certificate of Incorporation of TETRA Technologies,
          Inc (incorporated by reference to Exhibit 4.5 to the Company's
          Registration Statement on Form S-8 filed on May 4, 2006 (SEC File No.
          333-133790)).
4.6
Amended
          and Restated Bylaws of TETRA Technologies, Inc. (incorporated by reference
          to Exhibit 4.6 to the Company's Registration Statement on Form
          S-8 filed on May 4, 2006 (SEC File No. 333-133790)).
4.7
Certificate
          of Designation of Series One Junior Participating Preferred Stock of
          the Company, dated October 27, 1998 (incorporated by reference to Exhibit
          2 to the Company's Registration Statement on Form 8-A filed on
          October 28, 1998 (SEC File No. 001-13455)).
4.8
Rights
          Agreement, dated as of October 26, 1998, between the Company and Harris
          Trust and Savings Bank (predecessor to Computershare Investor Services
          LLC), as Rights Agent (incorporated by reference to Exhibit 1 to the
          Company's Registration Statement on Form 8-A filed on October
          28, 1998 (SEC File No. 001-13455)).
4.9
Specimen
          Common Stock Certificate of the Company (incorporated by reference to
          Exhibit 4.1 to the Company's Registration Statement on Form S-1
          filed on February 23, 1990 (SEC File No. 33-33586)).
4.10
Form
          of Certificate of Designation for the Preferred Stock (incorporated
          by reference to Exhibit 4.9 to the Company's Registration Statement
          on Form S-4 filed on May 25, 2004 (SEC File No. 333-115859)).
4.11
Specimen
          Preferred Stock Certificate of the Company (incorporated by reference
          to Exhibit 4.10 to the Company's Registration Statement on Form
          S-4 filed on May 25, 2004 (SEC File No. 333-115859)).
5.1*
Opinion
          letter, dated February 27, 2002, issued by the Internal Revenue Service
          to T Rowe Price Trust Co., the prototype plan sponsor of the form of
          plan document used for the TETRA Technologies, Inc. 401(k) Retirement
          Plan, as amended and restated.
23.1*
Consent
          of Ernst & Young LLP.
23.2*
Consent
          of Ryder Scott Company, L.P.
24.1*
Powers
          of Attorney (included on signature page).
99.1*
TETRA
          Technologies, Inc. 401(k) Retirement Plan, as amended and restated.
*
    Filed herewith.
-8-