Exhibit 23.3

Consent of Independent Auditors

We consent to the incorporation by reference in Registration Statement Nos. 333-122789, 333-128048, 333-158734, 333-158736, and 333-166358 on Form S-8 of Celanese Corporation of our report dated February 10, 2011 related to the financial statements of National Methanol Company (Ibn Sina) (which expresses an unqualified opinion and includes an explanatory paragraph relating to differences between accounting principles generally accepted in Saudi Arabia and accounting principles generally accepted in the United States of America) as of December 31, 2010 and 2009 and for each of the three years in the period ended December 31, 2010, appearing in this Annual Report on Form 10-K of Celanese Corporation for the year ended December 31, 2010.

/s/ DELOITTE & TOUCHE BAKR ABULKHAIR & CO.

Al Khobar
Saudi Arabia

February 10, 2011