FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.