Investor Information

Celanese Corporation
Investor Relations
1601 West LBJ Freeway
Dallas, Texas 75234-6034

Mark Oberle
Phone: +1 972 443 4464
Fax: +1 972 332 9373
Mark.Oberle@celanese.com

CELANESE CORPORATION DECLARES
COMMON AND PREFERRED SHARE DIVIDENDS

     DALLAS, Texas, July 5, 2006 — CELANESE CORPORATION (NYSE:CE), announced today that it declared quarterly dividends of $0.04 per share on its common stock and $0.265625 per share on its 4.25% convertible perpetual preferred stock, both payable on August 1, 2006.

     The dividends are payable for the period from May 1, 2006 and ending on and including July 31, 2006 to owners of record as of July 15, 2006.

Celanese Corporation (NYSE:CE) is an integrated global producer of value-added industrial chemicals based in Dallas, Texas. The Company has four major businesses: Chemicals Products, Technical Polymers Ticona, Acetate Products and Performance Products. Celanese has production plants in 13 countries in North America, Europe and Asia. In 2005, Celanese Corporation had net sales of $6.1 billion. For more information on Celanese Corporation, please visit the company’s web site at www.celanese.com.

Forward-looking statements (statements which are not historical facts) in this release are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Investors are cautioned that all forward-looking statements involve risks and uncertainties, including those risks and uncertainties detailed in the Company’s filings with the Securities and Exchange Commission, copies of which are available from the Company.