LYO Lyondell Chemical

Webcast Alert: Lyondell Chemical Company Announces First-Quarter 2005 Teleconference Schedule HOUSTON, March 28 /PRNewswire-FirstCall/ -- Lyondell Chemical Company (NYSE:LYO) announced the following schedule and contact information for its first-quarter earnings release and teleconference: Earnings Release: April 28, 2005 8:30 a.m. Eastern Time By PR Newswire distribution and Lyondell web site at http://www.lyondell.com/earnings . Teleconference: April 28, 2005 11:30 a.m. Eastern Time Hosted by Doug Pike, Vice President, Investor Relations, and Kevin DeNicola, Senior Vice President and Chief Financial Officer. Listen-only mode via telephone and Internet broadcast on Lyondell's web site at http://www.lyondell.com/earnings . Dial-In Numbers: U.S. Toll Free: 888-391-2385, Pass Code: Lyondell International: 517-645-6239, Pass Code: Lyondell Please call 10 to 15 minutes before the scheduled start of the teleconference. Web Replay: Will be available at 2:30 p.m. Eastern Time on April 28 at http://www.lyondell.com/earnings . Telephone Replay: Will be available from 1:30 p.m. Eastern Time April 28 to 5:00 p.m. Eastern Time on May 6. The dial-in numbers are: United States: 800-945-0145, Pass Code: 5549 International: 402-220-3525, Pass Code: 5549 Related Disclosures: Reconciliations of non-GAAP financial measures to GAAP financial measures and any other applicable disclosures (including the earnings release) will be available at 11:30 a.m. Eastern Time on April 28 at http://www.lyondell.com/earnings . (Minimum requirements to listen to broadcast: The Windows Media Player software, downloadable free from http://www.microsoft.com/windows/windowsmedia/default.aspx , and at least a 28.8Kbps connection to the Internet, or the RealPlayer software, downloadable free from http://www.real.com/products/player/index.html , and at least a 28.8Kbps connection to the Internet.) Chemicals Inc. DATASOURCE: Lyondell Chemical Company; Equistar Chemicals, LP; Millennium CONTACT: media, Susan P. Moore, +1-713-309-4645, or investors, Douglas J. Pike, +1-713-309-7141, both of Lyondell Chemical Company Web site: http://www.real.com/products/player/index.html http://www.microsoft.com/windows/windowsmedia/default.aspx Web site: http://www.lyondell.com/ http://www.lyondell.com/earnings

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