HOUSTON, May 29 /PRNewswire-FirstCall/ -- Dan F. Smith, Chairman, President and Chief Executive Officer of Lyondell Chemical Company (NYSE: LYO), will address analysts at the following event:

  Analyst               UBS Global Basic Materials Conference in London
  Conference:           Wednesday, June 6, 2007, at 11:00 a.m. GMT
                        (7:00 a.m. EDT).

  Web Site Access:      Live audio-only webcasting will be provided in
                        RealPlayer™ and Windows Media formats.  Beginning
                        at 11:00 a.m. GMT (7:00 a.m. EDT) on the day of the
                        event, the webcast can be accessed at
                        http://www.lyondell.com/investorpresentations.

                        The replay webcast will be available following our
                        presentation at
                        http://www.lyondell.com/investorpresentations.
                        The replay will be available until July 6, 2007.

  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 leading global manufacturer of chemicals and plastics, a refiner of heavy, high-sulfur crude oil and a significant producer of fuel products. Key products include ethylene, polyethylene, styrene, propylene, propylene oxide, gasoline, ultra low-sulfur diesel, MTBE and ETBE.

SOURCE: Lyondell Chemical Company

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

Web site: http://www.lyondell.com/