Investor Contacts

Cheryl Mahon
Executive Assistant, Investor Relations

+1-972-443-3728
cheryl.mahon@celanese.com

Stock Transfer Agent / Stockholder Services:
Computershare Investor Services

P.O. Box 43078
Providence, RI 02940-3078
Tel. +1-781-575-3400
http://www.computershare.com