HOUSTON, March 21 /PRNewswire/ -- Lyondell Chemical Company (NYSE: LYO) announced that Edward J. Dineen, Senior Vice President, Intermediates and Performance Chemicals, will address chemical industry analysts at the following event:

     Analysts Conference:  UBS Warburg Grass Roots Chemical Conference in New
                           Orleans
                           Tuesday, March 27, 2001 at 8:35 a.m. Central Time

     Web Site Access:      The slides will be available at the time of the
                           presentation and afterwards at www.lyondell.com,
                           investor relations -- presentations section.

     Dial In Number:       United States: 888-857-6932
                           International: 719-457-2604
                           Confirmation code: C# 622781 (Listen-only mode)

     Telephone Replay:     Will be available for four weeks after the event.
                           The dial-in number is:
                           United States: 888-567-0766
                           International: 402-530-0477.

SOURCE Lyondell Chemical Company
Web site: http: //www.lyondell.com
Photo: NewsCom: http: //www.newscom.com/cgi-bin/prnh/20000921/LYOLOGO AP Archive: http://photoarchive.ap.org PRN Photo Desk, 888-776-6555 or 201-369-3467
CONTACT: media, Marvin Brown, 713-309-2643, or investors, Investor Relations, 713-652-4590, both of Lyondell Chemical Company
CAPTION: LYOLOGO LYONDELL LOGO Lyondell Logo. (PRNewsFoto)[PM] HOUSTON, TX USA 09/21/2000