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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>UNITED
        STATES</strong></font></div>
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        8-K</strong></font></div>
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        CHEMICALS, INC.</strong></font></div>
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        the
        appropriate box below if the Form 8-K filing is intended to simultaneously
        satisfy the filing obligation of the registrant under any of the following
        provisions (see General Instruction A.2. below):</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>ITEM
        2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION</strong></font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
        October 31, 2005, the registrant released the results of operations and
        financial condition for the three months and nine months ended September
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        2005. Attached as Exhibit 99, and incorporated herein by reference, is a
        copy of
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          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">2</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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        Exhibits</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Press
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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        has
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                  CHEMICALS, INC.</strong></font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
              <td align="left" valign="top" width="43%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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UNITED
        STATES
SECURITIES
        AND EXCHANGE COMMISSION
Washington,
        D.C. 20549
FORM
        8-K
CURRENT
        REPORT
Pursuant
        to Section 13 or 15(d) of
the
        Securities Exchange Act of 1934
Date
        of Report (Date of earliest event reported): October 31,
        2005
ARCH
        CHEMICALS, INC.
(Exact
        name of registrant as specified in its charter)
Virginia
1-14601
06-1526315
(State
                  or other jurisdiction of incorporation)
(Commission
                  File Number)
(IRS
                  Employer Identification
                  No.)
501
                  Merritt 7, Norwalk, CT
06851
(Address
                  of principal executive offices)
(Zip
                  code)
Registrant's
        telephone number, including area code: (203) 229-2900
N/A
(Former
        name or former address, if changed since last report)
Check
        the
        appropriate box below if the Form 8-K filing is intended to simultaneously
        satisfy the filing obligation of the registrant under any of the following
        provisions (see General Instruction A.2. below):
¨
Written
                  communications pursuant to Rule 425 under the Securities Act (17
                  CFR
                  230.425)
¨
Soliciting
                  material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
                  240.14a-12)
¨
Pre-commencement
                  communications pursuant to Rule 14d-2(b) under the Exchange Act
                  (17 CFR
                  240.14d-2(b))
¨
Pre-commencement
                  communications pursuant to Rule 13e-4(c) under the Exchange Act
                  (17 CFR
                  240.13e-4(c))
ITEM
        2.02. RESULTS OF OPERATIONS AND FINANCIAL CONDITION
On
        October 31, 2005, the registrant released the results of operations and
        financial condition for the three months and nine months ended September
        30,
        2005. Attached as Exhibit 99, and incorporated herein by reference, is a
        copy of
        the registrant's earnings press release dated October 31, 2005.
2
ITEM
        9.01. FINANCIAL STATEMENTS AND EXHIBITS
(c)
        Exhibits
99.
Press
                  Release, dated October 31, 2005.
3
SIGNATURES
Pursuant
        to the requirements of the Securities Exchange Act of 1934, the Registrant
        has
        duly caused this report to be signed on its behalf by the undersigned hereunto
        duly authorized.
Date: October
        31, 2005
ARCH
                  CHEMICALS, INC.
By:
/s/Louis
                  S. Massimo
Name:
                  Louis S. Massimo
Title: Executive
                  Vice President and Chief Financial
                  Officer
4
Exhibit
        Index
Exhibit No.
Description
99.
Press
                  Release, dated October 31, 2005.
5