HOUSTON, April 5 /PRNewswire-FirstCall/ -- Lyondell Chemical Company (NYSE: LYO) today announced that beginning next week, the fluid catalytic cracking unit at its Houston refinery will be out of service for approximately 10 days to make minor adjustments to equipment installed during the refinery's recent upgrade. Lyondell said that other refinery units will continue to operate during this period, and estimated that the pre-tax impact on second- quarter results will be in the range of $20 million to $30 million.

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, titanium dioxide, gasoline, ultra low-sulfur diesel, MTBE and ETBE. Lyondell operates on five continents and employs nearly 11,000 people worldwide.

FORWARD LOOKING STATEMENTS

The statements in this release relating to matters that are not historical facts are forward-looking statements. These forward-looking statements are based upon the current beliefs and expectations of management, and are subject to significant risks and uncertainties. Actual results could differ materially based on factors including, but not limited to, completion of the equipment adjustment in the anticipated time period and with the estimated financial impact. Additional factors that could cause results to differ materially from those described in the forward-looking statements can be found in the Lyondell Annual Report on Form 10-K for the year ended December 31, 2006.

SOURCE: Lyondell Chemical Company

CONTACT: media, Susan P. Moore, +1-713-652-4645, or investors, Douglas
J. Pike, +1-713-309-7141, both of Lyondell Chemical Company

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