Exhibit 99.4

EXHIBIT 12.1

Celanese Corporation and Subsidiaries

Statement of Computation of Ratio of Earnings to Fixed Charges

Change in accounting policy regarding pension and other postretirement benefits

Effective January 1, 2013, we elected to change our policy for recognizing actuarial gains and losses and changes in the fair value of plan assets for our defined benefit pension plans and other postretirement benefit plans. We now immediately recognize in operating results net actuarial gains and losses and the change in fair value of plan assets annually in the fourth quarter of each fiscal year and whenever a plan is required to be remeasured. The remaining components of our net periodic benefit cost are recorded on a quarterly basis. For further discussion, see Note 2 - Summary of Accounting Policies in the consolidated financial statements included as Exhibit 99.3 to this Current Report on Form 8-K. Financial information for prior periods has been retrospectively adjusted.

	Year Ended December 31,
	2012		2011		2010		2009		2008
	As Adjusted
	(In $ millions, except ratios)
Earnings:
Earnings (loss) from continuing operations before tax	321		467		433		105		(114	)
Subtract
Equity in net earnings of affiliates	(242	)	(192	)	(168	)	(99	)	(172	)
Add
Income distributions from equity investments	262		205		138		78		183
Amortization of capitalized interest	2		2		2		2		2
Total fixed charges	247		283		262		268		324
Total earnings as defined before combined fixed charges	590		765		667		354		223
Fixed charges:
Interest expense	185		221		204		207		261
Capitalized interest	7		4		2		2		6
Estimated interest portion of rent expense	55		58		53		49		47
Cumulative preferred stock dividends	—		—		3		10		10
Guaranteed payment to minority shareholders	—		—		—		—		—
Total combined fixed charges	247		283		262		268		324
Ratio of earnings to combined fixed charges	2.4x		2.7x		2.5x		1.3x		0.7x

EX 99.4 - 1