-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 WerluRZZz3u42GWBOUTu7rnq7YwTzBjyktY/tQlrXCQZdAbUgjkkDXLdrwAZI3Dc
 uwiHDUH4NPXepCgJ6G582g==

<SEC-DOCUMENT>0001220617-03-000003.txt : 20030811
<SEC-HEADER>0001220617-03-000003.hdr.sgml : 20030811
<ACCEPTANCE-DATETIME>20030811183916
ACCESSION NUMBER:		0001220617-03-000003
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030808
FILED AS OF DATE:		20030811

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MCINTOSH JOHN L
		CENTRAL INDEX KEY:			0001220617

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-01070
		FILM NUMBER:		03835604

	BUSINESS ADDRESS:	
		STREET 1:		OLIN CORP
		STREET 2:		501 MERRITT 7
		CITY:			NORWALK
		STATE:			CT
		ZIP:			06856
		BUSINESS PHONE:		2037503795

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OLIN CORP
		CENTRAL INDEX KEY:			0000074303
		STANDARD INDUSTRIAL CLASSIFICATION:	ROLLING DRAWING & EXTRUDING OF NONFERROUS METALS [3350]
		IRS NUMBER:				131872319
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		501 MERRITT 7
		STREET 2:		P O BOX 4500
		CITY:			NORWALK
		STATE:			CT
		ZIP:			06856
		BUSINESS PHONE:		2037503000

	MAIL ADDRESS:	
		STREET 1:		OLIN CORP
		STREET 2:		501 MERRITT 7 PO BOX 4500
		CITY:			NORWALK
		STATE:			CT
		ZIP:			06851

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OLIN MATHIESON CHEMICAL CORP
		DATE OF NAME CHANGE:	19691008
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-08-08</periodOfReport>
    <issuer>
        <issuerCik>0000074303</issuerCik>
        <issuerName>OLIN CORP</issuerName>
        <issuerTradingSymbol>OLN</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001220617</rptOwnerCik>
            <rptOwnerName>MCINTOSH JOHN L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O OLIN CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>490 STUART RD. N. E.</rptOwnerStreet2>
            <rptOwnerCity>CLEVELAND</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>37312</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock $1 par value</value></securityTitle><transactionDate><value>2003-08-08</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>541</value></transactionShares><transactionPricePerShare><value>16.48</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1900</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOf
Ownership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock $1 par value</value></securityTitle><transactionDate><value>2003-08-08</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>900</value></transactionShares><transactionPricePerShare><value>16.47</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Commo
n Stock $1 par value</value></securityTitle><transactionDate><value>2003-08-08</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>1000</value></transactionShares><transactionPricePerShare><value>16.46</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeHolding><securityTitle><value>Common Stock $1 par value</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>6055.08</value><footnoteId id="F1"
/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>By ESOP Trustee</value></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><footnotes><footnote id="F1">The figure shown represents shares of Olin Common Stock acquired on a periodic basis under the Olin Corporation Contributing Employee Ownership Plan (CEOP), a tax-conditioned plan, in a transaction exempt under Rule 16b-3. These shares are held in the Olin Stock Fund of the CEOP.  This figure is based on information provided by the Plan Administrator as of August 8, 2003.</footnote></footnotes><remarks/><ownerSignature><signatureName>George H. Pain, Attorney-in-Fact</signatureName><signatureDate>2003-08-11</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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