This statement is filed in connection with (check the appropriate box):

Check the following box if the soliciting materials or information statement referred to in checking box (a) are preliminary copies: o

Check the following box if the filing is a final amendment reporting the results of the transaction: þ

Check the box if any part of the fee is offset as provided by §240.0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing. þ

     This Amendment No. 10 to the Rule 13e-3 Transaction Statement on Schedule 13E-3 amends and supplements the Schedule 13E-3 filed with the U.S. Securities and Exchange Commission (the “SEC”) by (i) Blackstone LR Associates (Cayman) IV Ltd., a limited duration company organized under the laws of the Cayman Islands, (ii) Blackstone Management Associates (Cayman) IV L.P., an exempted limited partnership organized under the laws of the Cayman Islands, (iii) Blackstone Capital Partners (Cayman) IV L.P., an exempted limited partnership organized under the laws of the Cayman Islands, (iv) Blackstone Capital Partners (Cayman) IV-A L.P., an exempted limited partnership organized under the laws of the Cayman Islands, (v) Blackstone Family Investment Partnership (Cayman) IV-A L.P., an exempted limited partnership organized under the laws of the Cayman Islands, (vi) Blackstone Chemical Coinvest Partners (Cayman) L.P., an exempted limited partnership organized under the laws of the Cayman Islands, (vii) Blackstone Capital Partners (Cayman) Ltd. 1, an exempt company organized under the laws of the Cayman Islands, (viii) Blackstone Capital Partners (Cayman) Ltd. 2, an exempt company organized under the laws of the Cayman Islands, (ix) Blackstone Capital Partners (Cayman) Ltd. 3, an exempt company organized under the laws of the Cayman Islands, (x) Celanese Corporation, a Delaware corporation, (xi) Crystal US Holdings 3 L.L.C., a Delaware limited liability company, (xii) Celanese Holdings LLC, a Delaware limited liability company, (xiii) BCP Crystal US Holdings Corp., a Delaware corporation, (xiv) Celanese Caylux Holdings Luxembourg S.C.A. (formerly BCP Caylux Holdings Luxembourg S.C.A.), a partnership limited by shares organized under the laws of the Grand Duchy of Luxembourg, (xv) BCP Holdings GmbH, a limited liability company organized under the laws of Germany, (xvi) BCP Acquisition GmbH & Co. KG, a limited partnership organized under the laws of Germany, (xvii) Celanese Europe Holding GmbH & Co. KG, a limited partnership organized under the laws of Germany (the “Purchaser”) and (xviii) Celanese Europe Management GmbH, a limited liability company organized under the laws of Germany, on April 13, 2005 (as it may be amended or supplemented from time to time, the “Schedule 13E-3”).

Item 15 of Schedule 13E-3 is hereby amended and supplemented by the following:

     Effective December 22, 2006, the transfer of all outstanding ordinary shares with no par value of the Issuer, held by the remaining minority shareholders of the Issuer in exchange for fair cash compensation (the “Squeeze-out”), as described in the Going Private Disclosure Document dated July 6, 2005, the Supplement to the Going Private Disclosure Document dated April 14, 2006 and other related filings, became final due to the registration in the commercial register of the Squeeze-out resolution passed at the Issuer’s shareholder meeting on May 30, 2006, after settlement of the shareholder lawsuits challenging this shareholders’ resolution. After effectiveness of the Squeeze-out, the Purchaser, a subsidiary of Celanese Corporation, now holds 100% of the ordinary shares of the Issuer (excluding ordinary shares held in treasury). Mellon Investor Services will provide shareholders with the required documentation and other information to submit share certificates and upon proper submission of certificates and other required documentation will pay former shareholders €66.99 per share and a pro rata gross guaranteed dividend in the amount of €1.196 per share, which is the pro rata amount corresponding to the time from October 1, 2006, to February 28, 2007, of the gross guaranteed dividend per share for the fiscal year ending September 30, 2007. Furthermore, Celanese AG shares on which the guaranteed dividend for the fiscal year ended September 30, 2006, have not yet been paid are eligible for a gross guaranteed dividend in the amount of €2.89 per share.

     At 12:01 am, New York City time, on Thursday, February 1, 2007, the subsequent offering period expired. To the extent that former shareholders properly submitted transmittal materials provided in connection with the mandatory offer by the Purchaser, required pursuant to Section 305 of the German Stock Corporation Act, to purchase all of the issued and outstanding registered ordinary shares, no par value, of the Issuer, since the effective date they received the higher Squeeze-out settlement amount described above.

     After due inquiry and to the best of my knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

Dated: February 1, 2007