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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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<SEC-DOCUMENT>0001181431-04-000113.txt : 20040102
<SEC-HEADER>0001181431-04-000113.hdr.sgml : 20040101
<ACCEPTANCE-DATETIME>20040102134229
ACCESSION NUMBER:		0001181431-04-000113
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040101
FILED AS OF DATE:		20040102

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LESAR DAVID J
		CENTRAL INDEX KEY:			0001198405

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10145
		FILM NUMBER:		04500856

	BUSINESS ADDRESS:	
		STREET 1:		4100 CLINTON DRIVE
		STREET 2:		BLDG. 1, 7TH FLOOR
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77020

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LYONDELL CHEMICAL CO
		CENTRAL INDEX KEY:			0000842635
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL ORGANIC CHEMICALS [2860]
		IRS NUMBER:				954160558
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1221 MCKINNEY ST
		STREET 2:		STE 700
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77010
		BUSINESS PHONE:		7136527200

	MAIL ADDRESS:	
		STREET 1:		1221 MCKINNEY ST
		STREET 2:		SUITE 700
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LYONDELL PETROCHEMICAL CO
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd27431.xml
<DESCRIPTION>ANNUAL DSU GRANT
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2004-01-01</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000842635</issuerCik>
        <issuerName>LYONDELL CHEMICAL CO</issuerName>
        <issuerTradingSymbol>lyo</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001198405</rptOwnerCik>
            <rptOwnerName>LESAR DAVID J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1221 MCKINNEY, SUITE 700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77010</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Deferred Stock Units</value><footnoteId id="F1"/></securityTitle><conversionOrExercisePrice><footnoteId id="F2"/></conversionOrExercisePrice><transactionDate><value>2004-01-01</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>2359.88</value></transactionShares><transactionPricePerShare><value>16.95</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F3"/></exerciseDate><expirationDate><footnoteId id="F3"/></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underly
ingSecurityTitle><underlyingSecurityShares><value>2359.88</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>24534.43</value><footnoteId id="F4"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Accrual of Deferred Stock Units pursuant to the Elective Deferral Plan for Non-Employee Directors.  Deferred Stock Units under the Plan accrue on the first day of each calendar year (at the closing price of a share of the Company's common stock on the last day of the preceding month) and on each dividend record date (at the closing price of a share of the Company's common stock on such dividend record dates).</footnote><footnote id="F2">Converts on a 1 for 1 basis.</footnote><footnote id="F3">Deferred Stock Units are settled in cash upon the reporting person's retirm
ent as provided in the Company's Elective Deferral Plan. Once each plan year, deferred compensation under the Elective Deferral Plan may be reallocated by the reporting person, effective as of the following plan year, to an interest-bearing cash account or as Deferred Stock Units under the plan.</footnote><footnote id="F4">Includes Deferred Stock Units accrued pursuant to a dividend reinvestment feature of the Elective Deferral Plan.</footnote></footnotes><ownerSignature><signatureName>Kerry A. Galvin, as attorney-in-fact for David J. Lesar</signatureName><signatureDate>2004-01-02</signatureDate></ownerSignature></ownershipDocument>



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