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<TITLE>SECURITIES AND EXCHANGE COMMISSION</TITLE>


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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): October 14, 2005</P>


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


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


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


<P ALIGN="JUSTIFY">The description set forth below is qualified in its entirety by the full text of the respective documents to which it refers, which documents are filed herewith.</P>


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


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


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


</B><P ALIGN="JUSTIFY">Effective October 14, 2005, LYONDELL-CITGO Refining LP (&quot;LCR&quot;) entered into two Accordion Agreements (the &quot;Accordion Agreements&quot;), by and among LCR, each of Credit Suisse (&quot;CS&quot;) and Bank of America as Increasing Lenders, and CS as Issuer and Administrative Agent, and exercised its right to increase its senior secured revolver by $50 million to an aggregate $150 million under the Credit Agreement (the &quot;Credit Agreement&quot;) dated as of May 21, 2004, as amended, among LCR, the lenders from time to time parties thereto, and CS, as Issuer and Administrative Agent. Lyondell Chemical Company (&quot;Lyondell&quot;) owns 58.75% of LCR, with CITGO Petroleum Corporation owning the remaining 41.25% of LCR. <FONT SIZE=1>&nbsp;</FONT>Lyondell has not guaranteed LCR's obligations under the Credit Agreement or the Accordion Agreements.  At October 14, 2005, $26 million was outstanding under the senior secured revolver.  The Credit Agreement has been previously filed with the SEC, and the Accordion Agreements are being filed with this Current Report on Form 8-K as Exhibits 4.3(b) and 4.3(c).</P>


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


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


<DIR>





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


<DIR>


<DIR>


<DIR>


<DIR>


<DIR>





<P ALIGN="JUSTIFY">4.3(b)&#9;Accordion Agreement</P>


<P ALIGN="JUSTIFY">4.3(c)&#9;Accordion Agreement</P>


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


<P ALIGN="JUSTIFY">&nbsp;</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> /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 19, 2005</P>


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


<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>


<DIR>


<DIR>


<DIR>


<DIR>


<DIR>


<DIR>





</U><P ALIGN="JUSTIFY">4.3(b)&#9;Accordion Agreement</P>


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


<DIR>





<P ALIGN="JUSTIFY">4.3(c)&#9;Accordion Agreement</P>


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


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


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


</FONT><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": "051144260"}, "business-address": {"street1": "1221 MCKINNEY ST", "street2": "SUITE 700", "city": "HOUSTON", "state": "TX", "zip": "77010", "phone": "713-652-7200"}, "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): October 14, 2005
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):
[ ]	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
[ ]	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
[ ]	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
[ ]	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
The description set forth below is qualified in its entirety by the full text of the respective documents to which it refers, which documents are filed herewith.
Item 1.01	Entry into a Material Definitive Agreement
Effective October 14, 2005, LYONDELL-CITGO Refining LP ("LCR") entered into two Accordion Agreements (the "Accordion Agreements"), by and among LCR, each of Credit Suisse ("CS") and Bank of America as Increasing Lenders, and CS as Issuer and Administrative Agent, and exercised its right to increase its senior secured revolver by $50 million to an aggregate $150 million under the Credit Agreement (the "Credit Agreement") dated as of May 21, 2004, as amended, among LCR, the lenders from time to time parties thereto, and CS, as Issuer and Administrative Agent. Lyondell Chemical Company ("Lyondell") owns 58.75% of LCR, with CITGO Petroleum Corporation owning the remaining 41.25% of LCR.
Lyondell has not guaranteed LCR's obligations under the Credit Agreement or the Accordion Agreements.  At October 14, 2005, $26 million was outstanding under the senior secured revolver.  The Credit Agreement has been previously filed with the SEC, and the Accordion Agreements are being filed with this Current Report on Form 8-K as Exhibits 4.3(b) and 4.3(c).
Item 9.01	Financial Statements and Exhibits
(c)	Exhibits
4.3(b)	Accordion Agreement
4.3(c)	Accordion Agreement
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 19, 2005
INDEX TO EXHIBITS
Exhibit
Number
Description
4.3(b)	Accordion Agreement
4.3(c)	Accordion Agreement