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<B><P ALIGN="CENTER">UNITED STATES</P>


<P ALIGN="CENTER">SECURITIES AND EXCHANGE COMMISSION</P>


<P ALIGN="CENTER">Washington, D.C. 20549</P>


</B><P ALIGN="CENTER"></P>


<B><P ALIGN="CENTER">FORM 8-K</P>


<P ALIGN="CENTER"></P>


</B><P ALIGN="CENTER">Current Report </P>


<P ALIGN="CENTER">Pursuant to Section 13 or 15(d) of the</P>


<P ALIGN="CENTER">Securities Exchange Act of 1934</P>


<P ALIGN="CENTER"></P>


<P ALIGN="CENTER">&nbsp;</P>


<P ALIGN="CENTER">Date of Report (date of earliest event reported): <B>September 30, 2004</P>


</B><P ALIGN="CENTER"></P>


<P ALIGN="CENTER">&nbsp;</P>


<B><FONT SIZE=5><P ALIGN="CENTER">LYONDELL CHEMICAL COMPANY</P>


</B></FONT><P ALIGN="CENTER">(Exact name of registrant as specified in its charter)</P>


<P ALIGN="CENTER"></P>


<B><P ALIGN="CENTER">Delaware</P>


</B><P ALIGN="CENTER">(State or other jurisdiction of incorporation)</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&#9;<B>1-10145&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;95-4160558</P>


</B><P ALIGN="JUSTIFY">(Commission File Number)&#9;&#9;&#9;&#9;&#9;(I.R.S. Employer Identification No.)</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&nbsp;</P>


<B><P ALIGN="JUSTIFY">1221 McKinney Street, Suite 700, Houston, Texas&#9;&#9;&#9;   77010</P>


</B><P ALIGN="JUSTIFY">&#9;(Address of principal executive offices)&#9;&#9;&#9;&#9;(Zip Code)</P>


<P ALIGN="JUSTIFY"></P>


<B><P ALIGN="CENTER">(713) 652-7200</P>


</B><P ALIGN="CENTER">(Registrant's telephone number, including area code)</P>


<P ALIGN="CENTER"></P>


<B><P ALIGN="CENTER">Not Applicable</P>


</B><P ALIGN="CENTER">(Former Name or Former Address, if Changed Since Last Report)</P>


<P ALIGN="CENTER"></P>


<P ALIGN="JUSTIFY">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 (<I>see </I>General Instruction A.2. below):</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&#9;<FONT FACE="Wingdings">&#111;</FONT>


&#9;Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&#9;<FONT FACE="Wingdings">&#111;</FONT>


&#9;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&#9;<FONT FACE="Wingdings">&#111;</FONT>


&#9;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&#9;<FONT FACE="Wingdings">&#111;</FONT>


&#9;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</P>


<B><P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">Item 1.01&#9;Entry into a Material Definitive Agreement</P>


</B><P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">On September 30, 2004, LYONDELL-CITGO Refining LP, a Delaware limited partnership (&quot;LCR&quot;), owned 58.75% by Lyondell Chemical Company (&quot;Lyondell&quot;) and 41.25% by CITGO Petroleum Corporation, entered into an amendment to its $550,000,000 Credit Agreement dated as of May&nbsp;21, 2004 among LCR, the lenders from time to time parties thereto, and Credit Suisse First Boston, as Issuer and Administrative Agent (the &quot;Amendment&quot;).  The Amendment reduces the pricing of the term loan and adds a fee for any prepayment associated with a re-pricing of the term loan during the first year after the effective date of the Amendment.  The Amendment also increases the Debt to Total Capitalization Ratio and excludes certain non-cash charges from the definition of Consolidated Net Worth.  The Amendment is being filed with this Current Report on Form 8-K as Exhibit 4.4(a). </P>





<B><P ALIGN="JUSTIFY">Item 9.01&#9;Financial Statements and Exhibits</P>


</B><P ALIGN="JUSTIFY">&#9;&#9;(c)&#9;Exhibits.</P><DIR>


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<P ALIGN="JUSTIFY">4.4(a)&#9;Amendment No. 1 dated as of September 30, 2004 to $550,000,000 Credit Agreement dated as of May&nbsp;21, 2004 among LCR, the lenders from time to time parties thereto, and Credit Suisse First Boston, as Issuer and Administrative Agent</P>


<P ALIGN="CENTER"></P></DIR>


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<B><P ALIGN="CENTER">SIGNATURE</P>


</B><P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&nbsp;</P>


<P ALIGN="JUSTIFY">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.</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&#9;&#9;&#9;&#9;&#9;&#9;&#9;LYONDELL CHEMICAL COMPANY</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&nbsp;</P>


<P ALIGN="JUSTIFY">&nbsp;</P>


<P ALIGN="JUSTIFY">&#9;&#9;&#9;&#9;&#9;&#9;&#9;By: <U>&#9;/s/ Kerry A. Galvin&#9;&#9;&#9;</P>


</U><P ALIGN="JUSTIFY">&#9;&#9;&#9;&#9;&#9;&#9;&#9;Name:&#9;Kerry A. Galvin</P>


<P ALIGN="JUSTIFY">&#9;&#9;&#9;&#9;&#9;&#9;&#9;Title:&#9;Senior Vice President, General &#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;Counsel &amp; Secretary</P>


<P ALIGN="JUSTIFY">&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&nbsp;</P>


<P ALIGN="JUSTIFY">Date:  October 5, 2004</P>


<FONT FACE="Arial" SIZE=1><P ALIGN="CENTER"></P>


</FONT><B><P ALIGN="CENTER">INDEX TO EXHIBITS</P>


</B><P ALIGN="CENTER"></P>


<P>Exhibit</P>


<U><P>Number</U>&#9;&#9;<U>Description</P>


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<DIR>


<DIR>


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</U><P ALIGN="JUSTIFY">4.4(a)&#9;Amendment No. 1 dated as of September 30, 2004 to $550,000,000 Credit Agreement dated as of May&nbsp;21, 2004 among LCR, the lenders from time to time parties thereto, and Credit Suisse First Boston, as Issuer and Administrative Agent</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&nbsp;</P>


<FONT FACE="Arial" SIZE=1><P ALIGN="JUSTIFY">&nbsp;</P>


<P ALIGN="JUSTIFY">&nbsp;</P></DIR>


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{"company-data": {"conformed-name": "LYONDELL CHEMICAL CO", "cik": "0000842635", "assigned-sic": "2860", "irs-number": "954160558", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-10145", "film-number": "041065787"}, "business-address": {"street1": "1221 MCKINNEY ST", "street2": "STE 700", "city": "HOUSTON", "state": "TX", "zip": "77010", "phone": "7136527200"}, "mail-address": {"street1": "1221 MCKINNEY ST", "street2": "SUITE 700", "city": "HOUSTON", "state": "TX", "zip": "77010"}, "former-company": {"former-conformed-name": "LYONDELL PETROCHEMICAL CO", "date-changed": "19920703"}}
SECURITIES AND EXCHANGE COMMISSION
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):
September 30, 2004
LYONDELL CHEMICAL COMPANY
(Exact name of registrant as specified in its charter)
Delaware
(State or other jurisdiction of incorporation)
1-10145								95-4160558
(Commission File Number)					(I.R.S. Employer Identification No.)
1221 McKinney Street, Suite 700, Houston, Texas			   77010
(Address of principal executive offices)				(Zip Code)
(713) 652-7200
(Registrant's telephone number, including area code)
Not Applicable
(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 (
see
General Instruction A.2. below):
o
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 1.01	Entry into a Material Definitive Agreement
On September 30, 2004, LYONDELL-CITGO Refining LP, a Delaware limited partnership ("LCR"), owned 58.75% by Lyondell Chemical Company ("Lyondell") and 41.25% by CITGO Petroleum Corporation, entered into an amendment to its $550,000,000 Credit Agreement dated as of May 21, 2004 among LCR, the lenders from time to time parties thereto, and Credit Suisse First Boston, as Issuer and Administrative Agent (the "Amendment").  The Amendment reduces the pricing of the term loan and adds a fee for any prepayment associated with a re-pricing of the term loan during the first year after the effective date of the Amendment.  The Amendment also increases the Debt to Total Capitalization Ratio and excludes certain non-cash charges from the definition of Consolidated Net Worth.  The Amendment is being filed with this Current Report on Form 8-K as Exhibit 4.4(a).
Item 9.01	Financial Statements and Exhibits
(c)	Exhibits.
4.4(a)	Amendment No. 1 dated as of September 30, 2004 to $550,000,000 Credit Agreement dated as of May 21, 2004 among LCR, the lenders from time to time parties thereto, and Credit Suisse First Boston, as Issuer and Administrative Agent
SIGNATURE
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.
LYONDELL CHEMICAL COMPANY
By:
/s/ Kerry A. Galvin
Name:	Kerry A. Galvin
Title:	Senior Vice President, General 									Counsel & Secretary
Date:  October 5, 2004
INDEX TO EXHIBITS
Exhibit
Number
Description
4.4(a)	Amendment No. 1 dated as of September 30, 2004 to $550,000,000 Credit Agreement dated as of May 21, 2004 among LCR, the lenders from time to time parties thereto, and Credit Suisse First Boston, as Issuer and Administrative Agent