HOUSTON, March 9, 2005 /PRNewswire-FirstCall via COMTEX/ -- Kevin DeNicola, Sr. Vice President and Chief Financial Officer of Lyondell Chemical Company (NYSE: LYO), will address analysts at the following event:

Analyst               Lehman Brothers 2005 High Yield Bond and Syndicated
     Conference:           Loan Conference, Friday, March 18, 2005, at
                           9:15 a.m. Eastern Time.

     Web Site Access:      Live audio-only webcasting will be provided in
                           RealPlayer(TM) and Windows Media formats.
                           Beginning at 9:15 a.m. Eastern Time on the day of
                           the event, the webcast can be accessed at
                           http://www.lyondell.com/investorpresentations .

                           The replay webcast will be available by March 21,
                           2005 at
                           http://www.lyondell.com/investorpresentations .
                           The replay will be available until June 18, 2005.

     Presentation:         The slides will be available at the time of the
                           presentation and afterwards at
                           http://www.lyondell.com/investorpresentations .

     Related Disclosures:  Reconciliations of non-GAAP financial measures to
                           GAAP financial measures and any other applicable
                           disclosures (including the slides) will be
                           available at the time of the presentations and
                           afterwards at
                           http://www.lyondell.com/investorpresentations .

    ABOUT LYONDELL

Lyondell Chemical Company, headquartered in Houston, Texas, is North America's third-largest independent, publicly traded chemical company. Lyondell is a major global manufacturer of basic chemicals and derivatives including ethylene, propylene, titanium dioxide, styrene, polyethylene, propylene oxide and acetyls. It also is a significant producer of gasoline blending components. The company has a 58.75 percent interest in LYONDELL- CITGO Refining LP, a refiner of heavy, high-sulfur crude oil. As a result of Lyondell's November 30, 2004 acquisition of Millennium Chemicals Inc., Millennium and Equistar Chemicals, LP are wholly owned subsidiaries of Lyondell. Lyondell is a global company operating on five continents and employs approximately 10,000 people worldwide.

SOURCE Lyondell Chemical Company

media, Susan P. Moore,
+1-713-309-4645, or
investors, Douglas J. Pike,
+1-713-309-4590,
both of Lyondell Chemical Company