1. Name and Address of Reporting Person * OSTMEIER HANNS	2. Date of Event Requiring Statement (MM/DD/YYYY) 1/19/2005	3. Issuer Name and Ticker or Trading Symbol Celanese CORP [CE]
(Last)        (First)        (Middle) C/O THE BLACKSTONE GROUP, 345 PARK AVENUE	4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __ X __ Director                            _____ 10% Owner _____ Officer (give title below)          _____ Other (specify below)
(Street) NEW YORK, NY 10154        (City)              (State)              (Zip)	5. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _ X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks: Mr. Ostmeier is associated with Blackstone LR Associates (Cayman) IV Ltd. ("BLRA"). BLRA may be deemed to be the beneficial owner of the shares of Series B common stock of Celanese Corporation for the following reason: 92,360,339 shares of Series B common stock of Celanese Corporation are owned by Blackstone Capital Partners (Cayman) Ltd. 1 ("Cayman 1"), Blackstone Capital Partners (Cayman) Ltd. 2 ("Cayman 2"), and Blackstone Capital Partners (Cayman) Ltd. 3 ("Cayman 3" and collectively with Cayman 1 and Cayman 2, the "Cayman Entities"). Blackstone Capital Partners (Cayman) IV L.P. ("BCP IV") owns 100% of Cayman 1. Blackstone Family Investment Partnership (Cayman) IV-A L.P. ("BFIP") and Blackstone Capital Partners (Cayman) IV-A L.P. ("BCP IV-A") collectively own 100% of Cayman 2. Blackstone Chemical Coinvest Partners (Cayman) L.P. ("BCCP" and, collectively with BCP IV, BFIP and BCP IV-A, the "Blackstone Funds") owns 100% of Cayman 3. Each of the Blackstone Funds may be deemed to be the beneficial owner of the shares of Series B common stock held by the Cayman Entities owned by such Blackstone Funds. Blackstone Management Associates (Cayman) IV L.P. ("BMA") is the general partner of each of the Blackstone Funds and may, therefore, be deemed to be the beneficial owner of the share of Series B common stock held by the Cayman Entities. BLRA is the general partner of BMA and may, therefore, be deemed to be the beneficial owner of shares of Series B common stock held by the Cayman Entities. Mr. Ostmeier disclaims beneficial ownership of shares of the Series B common stock that may be deemed beneficially owned by BLRA or any other affiliates of The Blackstone Group set forth above. This report shall not be deemed an admission that Mr. Ostmeier is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act of 1934, as amended, or for any other purpose.

No securities are beneficially owned.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
OSTMEIER HANNS C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK, NY 10154	X

Signatures
Hanns Ostmeier		1/19/2005
** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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