HOUSTON, Jan. 11 /PRNewswire-FirstCall/ -- Lyondell Chemical Company (NYSE: LYO) announced the following schedule and contact information for its fourth-quarter and full-year 2005 earnings release and teleconference:

   Earnings Release:     January 26, 2006
                         8:30 a.m. Eastern Time
                         By PR Newswire distribution and Lyondell web site
                         at http://www.lyondell.com/earnings .

   Teleconference:       January 26, 2006
                         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
                         January 26 at http://www.lyondell.com/earnings .

   Telephone Replay:     Will be available from 1:30 p.m. Eastern Time
                         January 26 to 6:00 p.m. Eastern Time on February 3.
                         The dial-in numbers are:
                         United States:  866-490-2543, Pass Code:  5549
                         International:  203-369-1699, 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
                         January 26 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.

SOURCE: Lyondell Chemical Company; Equistar Chemicals, LP; Millennium

CONTACT: media, Lisa M. Martin, +1-713-309-4890, or investors, Douglas J.
Pike, +1-713-309-4590, both of Lyondell Chemical Company

Web site: http://www.microsoft.com/windows/windowsmedia/default.aspx
http://www.real.com/products/player/index.html

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