Exhibit12

CELANESE HOLDINGS LLCCOMPUTATION OF RATIO OF EARNINGS TOFIXEDCHARGES

|                                                                           |  |                               |        |                                 |  |                                |     |                                  |  |        |         |         |  |        |         |         |  |  |
|---------------------------------------------------------------------------|--|-------------------------------|--------|---------------------------------|--|--------------------------------|-----|----------------------------------|--|--------|---------|---------|--|--------|---------|---------|--|--|
|                                                                      |  | Successor                     |        | Predecessor                     |
|                                                                      |  | SixMonths Ended June 30, 2005 |        | Three Months EndedJune 30, 2005 |  | Three Months Ended June30,2004 |     | Three Months Ended March 31,2004 |
| **Earnings:**                                                             |  |                          |   |                            |  |
| Earnings(loss) from continuing operations before tax and minorityinterest |  |                          | 190    |                            |  |                           | 133 |                             |  |   | (95     | )  |  |   | 72      |    |
| Less:                                                                     |  |                          |   |                            |  |
| Equity in net earnings ofaffiliates                                       |  |                          | (27    | )                          |  |                           | (12 | )                           |  |   | (18     | )  |  |   | (12     | )  |
| Plus:                                                                     |  |                          |   |                            |  |
| Income distributionsfrom equityinvestments                                |  |                          | 46     |                            |  |                           | 10  |                             |  |   | 6       |    |  |   | 15      |    |
| Amortizationof capitalizedinterest                                        |  |                          | 3      |                            |  |                           | 1   |                             |  |   | 2       |    |  |   | 2       |    |
| Totalfixedcharges                                                         |  |                          | 228    |                            |  |                           | 73  |                             |  |   | 131     |    |  |   | 16      |    |
| Totalearnings as defined before combined fixedcharges                     |  |                          | 440    |                            |  |                           | 205 |                             |  |   | 26      |    |  |   | 93      |    |
| **Fixedcharges:**                                                         |  |                          |   |                            |  |
| Interestexpense                                                           |  |                          | 199    |                            |  |                           | 59  |                             |  |   | 124     |    |  |   | 6       |    |
| Capitalizedinterest                                                       |  |                          | 2      |                            |  |                           | 1   |                             |  |   | 1       |    |  |   | 3       |    |
| Estimatedinterest portion of rentexpense                                  |  |                          | 12     |                            |  |                           | 6   |                             |  |   | 6       |    |  |   | 7       |    |
| Guaranteedpayment to minorityshareholders                                 |  |                          | 15     |                            |  |                           | 7   |                             |  |   | — |    |  |   | — |    |
| Totalcombined fixedcharges                                                |  |                          | 228    |                            |  |                           | 73  |                             |  |   | 131     |    |  |   | 16      |    |
| Ratioof earnings to combined fixed charges(1)                             |  |                          | 1.9    |                            |  |                           | 2.8 |                             |  |   | 0.2     |    |  |   | 5.8     |    |
|                                                                           |

|     |                                                                                                                   |
|-----|-------------------------------------------------------------------------------------------------------------------|
| (1) | Earningswere insufficient to cover combined fixed charges by $105 million forthe three months ended June 30,2004. |

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