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<title>Prepared By R.R. Donnelley Financial -- Form 8-K</title>
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<b>UNITED STATES </b></font></div>

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<b>SECURITIES AND EXCHANGE COMMISSION </b></font></div>

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<b>Washington D.C., 20549 </b></font></div>

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<b>Form 8-K </b></font></div> <div><font Size="1">&nbsp;</font></div>

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<b>Current Report </b></font></div>

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<b>Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 </b></font></div>

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<b>Date Of Report (Date Of Earliest Event Reported):&nbsp;&nbsp;10/04/2005 </b></font></div>




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<b>OLIN CORPORATION </b></font></div>

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<b>(Exact Name of Registrant as Specified in its Charter)</b></font></div>

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<b>Commission File Number:&nbsp;&nbsp;1-1070</b></font></div>

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<div Align="center"><font Face="times New Roman" Size="3" Color="#000000"><b>VA</b></font>
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<div Align="center"><font Face="times New Roman" Size="3" Color="#000000"><b>13-1872319</b></font>
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<b>(State or Other Jurisdiction of</b></font>
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<div Align="center"><font Face="times New Roman" Size="2" Color="#000000"><b>(I.R.S. Employer</b></font>
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<b>Incorporation or Organization)</b></font>
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<b>Identification No.)</b></font>
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<b>190 Carondelet Plaza Suite 1530 Clayton, MO 63105</b></font></div>


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<b>(Address of Principal Executive Offices, Including Zip Code)</b></font>
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<b>314-480-1400 </b></font>
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<b>(Registrant&#146;s Telephone Number, Including Area Code) </b></font>
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<b> </b></font>
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<b>(Former name or former address, if changed since last report) </b></font>
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<b>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:<BR><BR>
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<b>[&nbsp;&nbsp;]&nbsp;&nbsp;
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<BR><BR>

[&nbsp;&nbsp;]&nbsp;&nbsp;
Soliciting material pursuant to Rule 14a-12 under the Exchange Act(17CFR240.14a-12)<BR><BR>


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Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17CFR240.14d-2(b))<BR><BR>


[&nbsp;&nbsp;]&nbsp;&nbsp;
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17CFR240.13e-4(c))
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Items to be Included in this Report</b>
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<b>Item 7.01.&nbsp;&nbsp;&nbsp;&nbsp;Regulation FD Disclosure</b></font>
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In accordance with General Instruction B.2. of Form 8-K, the following information shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended.  Olin disclaims any intention or obligation to update or revise this information.<p>Attached as Exhibit 99.1 and incorporated herein by reference, is a copy of the registrant's press release dated October 4, 2005, announcing that its third quarter 2005 earnings are currently estimated to be in the $0.43 per diluted share range compared to the previous forecast of earnings in the $0.40 per diluted share range.</font>
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<b>Item 9.01.&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements and Exhibits</b></font>
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Exhibit 99.1 Press Release, dated October 4, 2005.</font>
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<b>Signature(s) </b></font>
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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. </font>
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	OLIN CORPORATION</font>
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	Date: October 04, 2005.</font>
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	By:</font>
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	/s/&nbsp;&nbsp;&nbsp;&nbsp;George H. Pain</font>
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	George H. Pain</font>
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	<div><font Face="times New Roman" Size="2" Color="#000000">Vice President, General Counsel & Secretary</font>
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<b>Exhibit Index </b></font>
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	<b>Exhibit&nbsp;No.</b></font>
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	<b>Description</b></font>
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	EX-99.1</font>
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	Press Release, dated October 4, 2005</font>
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Prepared By R.R. Donnelley Financial -- Form 8-K
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):  10/04/2005
OLIN CORPORATION
(Exact Name of Registrant as Specified in its Charter)
Commission File Number:  1-1070
VA
13-1872319
(State or Other Jurisdiction of
(I.R.S. Employer
Incorporation or Organization)
Identification No.)
190 Carondelet Plaza Suite 1530 Clayton, MO 63105
(Address of Principal Executive Offices, Including Zip Code)
314-480-1400
(Registrant's Telephone Number, Including Area Code)
(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:
[  ]  
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(17CFR240.14a-12)
[  ]  
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17CFR240.14d-2(b))
[  ]  
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17CFR240.13e-4(c))
Items to be Included in this Report
Item 7.01.    Regulation FD Disclosure
In accordance with General Instruction B.2. of Form 8-K, the following information shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended.  Olin disclaims any intention or obligation to update or revise this information.
Attached as Exhibit 99.1 and incorporated herein by reference, is a copy of the registrant's press release dated October 4, 2005, announcing that its third quarter 2005 earnings are currently estimated to be in the $0.43 per diluted share range compared to the previous forecast of earnings in the $0.40 per diluted share range.
Item 9.01.    Financial Statements and Exhibits
Exhibit 99.1 Press Release, dated October 4, 2005.
Signature(s)
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.
OLIN CORPORATION
Date: October 04, 2005.
By:
/s/    George H. Pain
George H. Pain
Vice President, General Counsel & Secretary
Exhibit Index
Exhibit No.
Description
EX-99.1
Press Release, dated October 4, 2005