-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CmJr4EZTu08balM6gXoXaYm6FfxHLkWupoeqsbC/nGqLLawaRU3zM6BADSVcNK8d
 OkLYkNIDs2rWiGPTg/Ggiw==

<SEC-DOCUMENT>0000081362-05-000007.txt : 20050310
<SEC-HEADER>0000081362-05-000007.hdr.sgml : 20050310
<ACCEPTANCE-DATETIME>20050310185423
ACCESSION NUMBER:		0000081362-05-000007
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050309
FILED AS OF DATE:		20050310
DATE AS OF CHANGE:		20050310

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			QUAKER CHEMICAL CORP
		CENTRAL INDEX KEY:			0000081362
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS PRODUCTS OF PETROLEUM &  COAL [2990]
		IRS NUMBER:				230993790
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE QUAKER PARK
		STREET 2:		901 HECTOR STREET
		CITY:			CONSHOHOCKEN
		STATE:			PA
		ZIP:			19428
		BUSINESS PHONE:		6108324000

	MAIL ADDRESS:	
		STREET 1:		ONE QUAKER PARK
		STREET 2:		901 HECTOR ST
		CITY:			CONSHOHOCKEN
		STATE:			PA
		ZIP:			19428

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CURTIS REX E
		CENTRAL INDEX KEY:			0001272440

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12019
		FILM NUMBER:		05673585

	MAIL ADDRESS:	
		STREET 1:		C/O QUAKER CHEMICAL CORP
		STREET 2:		ONE QUAKER PARK 901 HECTOR ST
		CITY:			CONSHOHOCKEN
		STATE:			PA
		ZIP:			19428
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c0001272440d20050310f4f.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-03-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000081362</issuerCik>
        <issuerName>QUAKER CHEMICAL CORP</issuerName>
        <issuerTradingSymbol>KWR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001272440</rptOwnerCik>
            <rptOwnerName>CURTIS REX E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>QUAKER CHEMICAL CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>ONE QUAKER PARK, 901 HECTOR STREET</rptOwnerStreet2>
            <rptOwnerCity>CONSHOHOCKEN</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19428-0809</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP &amp; GIL - Automotive MW</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1886</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>by 401(k)</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options (Right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>21.97</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-03-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5840</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-06-15</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2012-03-09</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5840</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5840</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Information based on 12/31/04 Plan Statement.</footnote>
        <footnote id="F2">Non-qualified stock options granted to reporting person pursuant to Company's Long-Term Performance Incentive Plan of which 100% of the options granted vest on June 15, 2005.  No shares realized by any exercise of these options may be sold before June 15, 2007.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Irene M. Kisleiko</signatureName>
        <signatureDate>2005-03-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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