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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 xJ3szewd8Zf3Qs5dlEYdVA==

<SEC-DOCUMENT>0001179110-05-013459.txt : 20050701
<SEC-HEADER>0001179110-05-013459.hdr.sgml : 20050701
<ACCEPTANCE-DATETIME>20050701144026
ACCESSION NUMBER:		0001179110-05-013459
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050701
FILED AS OF DATE:		20050701
DATE AS OF CHANGE:		20050701

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DUNN KEVIN M
		CENTRAL INDEX KEY:			0001246331

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06450
		FILM NUMBER:		05932648

	MAIL ADDRESS:	
		STREET 1:		300 NYALA FARMS ROAD
		STREET 2:		PLAYTEX PRODUCTS INC
		CITY:			WESTPORT
		STATE:			CT
		ZIP:			06880

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GREAT LAKES CHEMICAL CORP
		CENTRAL INDEX KEY:			0000043362
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS CHEMICAL PRODUCTS [2890]
		IRS NUMBER:				951765035
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		9025 NORTH RIVER RD.
		STREET 2:		SUITE 400
		CITY:			INDIANAPOLIS
		STATE:			IN
		ZIP:			46221
		BUSINESS PHONE:		3177153000

	MAIL ADDRESS:	
		STREET 1:		9025 NORTH RIVER RD.
		STREET 2:		SUITE 400
		CITY:			INDIANAPOLIS
		STATE:			IN
		ZIP:			46240

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GREAT LAKES OIL & CHEMICAL CO
		DATE OF NAME CHANGE:	19700925

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MCCLANAHAN OIL CO
		DATE OF NAME CHANGE:	19700925
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-07-01</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000043362</issuerCik>
        <issuerName>GREAT LAKES CHEMICAL CORP</issuerName>
        <issuerTradingSymbol>GLK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001246331</rptOwnerCik>
            <rptOwnerName>DUNN KEVIN M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9025 NORTH RIVER ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 400</rptOwnerStreet2>
            <rptOwnerCity>INDIANAPOLIS</rptOwnerCity>
            <rptOwnerState>IN</rptOwnerState>
            <rptOwnerZipCode>46240</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Vice President</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common</value>
            </securityTitle>
            <transactionDate>
                <value>2005-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>160.799</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By 401(k)</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.000</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15000.0000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.000</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-12-14</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2008-12-14</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15000.0000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.000</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15000.0000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.000</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2006-02-08</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2009-02-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15000.0000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Disposed of pursuant to the Agreement and Plan of Merger, dated March 8, 2005 (the &quot;Merger Agreement&quot;), by and among Crompton Corporation (&quot;Crompton&quot;), Copernicus Merger Corporation and Great Lakes Chemical Corporation (&quot;Great Lakes&quot;) in exchange for 2.2232 shares of Crompton common stock (the &quot;Exchange Ratio&quot;) in accordance with the terms of the Merger Agreement having a market value of $14.15 on 6/30/2005.</footnote>
        <footnote id="F2">This option, when granted, provided for vesting in 3 equal annual installments beginning on the first anniversary of the grant, and in accordance with its terms will become fully vested upon the consummation of the merger.  Pursuant to the Merger Agreement, such options have been assumed by Crompton and will be exercisable for Crompton common stock based on the Exchange Ratio.</footnote>
        <footnote id="F3">These securities were held in accordance with Great Lakes 401(k) savings plan and have been assumed by Crompton pursuant to the Exchange Ratio.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Karen Witte Duros, Attorney-in-Fact for Kevin M. Dunn</signatureName>
        <signatureDate>2005-07-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----