This document provides a summary of the accounting adjustments made to reflect the purchase of Celanese AG by Blackstone in Celanese Corporation's financial statements. Key points include: - Blackstone acquired 84% of Celanese AG for $1.693 billion in April 2004 and the remaining 16% in an internal restructuring in October 2004. - The balance sheet was adjusted to reflect the assets acquired and liabilities assumed at fair value, including property, plant and equipment, intangible assets, pensions and other obligations. - Goodwill was recorded for the excess of the purchase price over the fair value of net assets acquired. The allocation of the purchase price was prepared by a third party.

1. White Paper
Celanese Purchase Accounting –
Celanese AG Acquisition
August 2005

2. TAB L E O F CO N T EN T S
Table of Contents
Disclaimer .......................................................................................................... 3
Introduction ...................................................................................................... 4
Overview – Celanese AG Acquisition and Internal Restructuring ................... 4
Comparative Balance Sheets .............................................................................. 5
Explanation of Balance Sheet Adjustments ...................................................... 6

3. D IS CL AI M ER
Disclaimer
Celanese Corporation (the “Company”) is providing the financial information contained herein
for informational purposes only. Such financial information has not been audited, is based on
internal financial data furnished to management and should not be taken as representative of the
Company’s future consolidated results of operations or financial position. While the Company
believes that the financial information disclosed herein is accurate as of the dates presented, the
Company in no way guarantees that such information is complete or accurate, does not assume
any obligation to update or correct such information and explicitly disclaims any duty to do so.

4. Pu R ChA SE ACCO u N T I N g ANALySIS – ACq u ISI T I O N O F CEL AN E SE Ag
Introduction
The following provides background on the mechanics used to properly reflect the purchase price
of the Blackstone acquisition of Celanese AG in the Celanese Corporation financial statements.
The financial statements reflect the acquisition of Celanese AG under the purchase method of
accounting in accordance with Financial Accounting Standards Board Statement of Financial
Accounting Standards (“SFAS”) No. 141, Business Combinations, which requires the purchase
price to be allocated at the fair value of the underlying assets acquired and liabilities assumed.
The excess of the purchase price over the underlying fair value is recorded as goodwill. SFAS 141
stipulates that accounting for business combinations under the pooling of interest method is no
longer acceptable and that the purchase method of accounting must be used.
Overview – Celanese AG Acquisition
and Internal Restructuring
On April 6, 2004, affiliates of the Blackstone Group acquired approximately 84 % of the ordinary
shares of Celanese AG, excluding treasury shares, for a purchase price of $1.693 billion, including
direct acquisition costs of approximately $69 million (the “Acquisition”).
In October 2004, Celanese Corporation and certain of its subsidiaries completed an internal
restructuring (the “Restructuring”) under the Domination Agreement pursuant to which all of
the shares of Celanese Americas Corporation and its subsidiaries (“CAC”) were transferred from
Celanese Holding GmbH, a wholly owned subsidiary of Celanese AG, to ultimately BCP Crystal
US Holdings Corp (“US Holdings”). In addition to the restructuring, certain Blackstone acquisi-
tion entities were renamed and reshuffled resulting in the formation of Celanese Corporation,
a U.S. company, which was then owned 100 % by affiliates of the Blackstone Group. Celanese
Corporation became the “Topco” in the Celanese consolidation.
As a result of these transactions, US Holdings, a subsidiary owned 100 % by Celanese Corpora-
tion, holds 100 % of CAC’s equity and, indirectly, all equity owned by CAC and its subsidiaries.
In addition, US Holdings holds, indirectly, a significant and controlling share of the outstanding
ordinary shares of Celanese AG.
Upon completion of the internal restructuring, the assets acquired and liabilities assumed of
CAC are reflected at fair value for the 100 % portion acquired (approximately 84 % as of April 6,
2004 and the remaining approximate 16 % as of October 6, 2004).
For the quarter ended September 30, 2004, Celanese Corporation preliminarily allocated the
purchase price of Celanese AG on the basis of its estimate of the fair value of the underlying as-
sets acquired and liabilities assumed. The assets acquired and liabilities assumed were reflected at
fair value for the approximate 84 % portion acquired by Blackstone and at the historical basis for
the remaining approximate 16 %. The valuation was prepared by a third party consulting group,
as of the acquisition date.

5. Pu R ChA SE ACCO u N T I N g ANALySIS – ACq u ISI T I O N O F CEL AN E SE Ag
Comparative Balance Sheets
The following table provides a comparison of Celanese Corporation’s opening balance sheet as of
April 1, 2004 both prior and subsequent to purchase accounting adjustments:
As of April 1, 2004
Prior to Subsequent to
Purchase Accounting Purchase Accounting
in US $ million
Current assets:
Cash and cash equivalents 93 93
Receivables 1,364 1,471
Inventories 516 569
Other current assets 126 125
Investments 552 554
Property plant and equipment 1,649 1,725
Other non-current assets 1,214 740
Intangible assets 31 433
Goodwill 1,069 767
Total assets acquired 6,614 6,477
Current liabilities:
Short-term borrowings and current installments of long-term debt 279 279
Accounts payable and accrued liabilities 599 599
Other current liabilities 1,089 1,170
Long term debt 308 306
Benefit obligations 1,138 1,370
Other long term liabilities 560 553
Total liabilities assumed 3,973 4,277
Minority interest 18 474
Net assets acquired 2,623 1,726

6. Pu R ChA SE ACCO u N T I N g ANALySIS – ACq u ISI T I O N O F CEL AN E SE Ag
Explanation of Balance Sheet Adjustments
Assets and Liabilities Recorded at Carrying Value
Cash and cash equivalents, receivables, other current assets, accounts payable and accrued
liabilities and other current liabilities were stated at their historical carrying values, given the
short term nature of these assets and liabilities.
Receivables
The increase in receivables was driven primarily by a $44 million receivable recorded in the
fourth quarter of 2004 related to the an insurance settlement with one of the insurers of the
plumbing cases and a $77 million settlement ($40 million of which resulted in an increase to
non-trade receivables with a corresponding decrease in goodwill) related to the 2000 sale of the
majority of Celanese AG’s 50 % interest in the Vinnolit Kunststoff GmbH venture (see Commit-
ments and Contingencies footnote and Liquidity section of the Celanese Corporation Annual
Report on Form 10-K for further detail).
Inventories
The estimated fair value of inventory has been calculated based on management’s computations
and a valuation prepared by a third party consulting group. The consolidated statement of opera-
tions for the nine months ended December 31, 2004 includes a $53 million charge to cost of sales
representing the capitalized manufacturing profit in inventory on hand as of the acquisition date.
The capitalized manufacturing profit was recorded in purchase accounting and the inventory was
subsequently sold during the nine months ended December 31, 2004.
The March 31, 2004 inventory balances were “stepped up” to fair value for finished goods inven-
tory based on Blackstone’s approximate 84 % ownership percentage. Following the internal
restructuring, the remaining approximate 16 % was stepped up for the CAC inventory on hand as
of the internal restructuring date in the fourth quarter of 2004.
Investments (Equity)
The net change in the Celanese Corporation’s equity method investments (from book value to
fair value), included in investments above, netted to approximately zero.
Property Plant Equipment (“PPE”)
PPE was stepped-up by approximately $76 million (with the offset recorded to goodwill) and
new remaining useful lives were assigned to all assets. As a result, depreciation expense decreased
by approximately $65 million for the twelve months ended December 31, 2004, as compared to
the same period one year earlier.

7. Pu r cha se acco u n t i n g analysis – acq u isi t i o n o f cel an e se ag
Other Non-current Assets
The change in other non-current assets is driven by the change in value of the investments
accounted for under the cost method and deferred taxes.
Investments accounted for under the cost method of accounting approximated $220 million fair
value at the acquisition date, which resulted in a step up of approximately $110 million.
Deferred income taxes are recorded in the consolidated balance sheet based on the difference
between the tax basis and stepped up (or down) adjusted book basis of the assets acquired and
liabilities assumed.
A majority of the pre-acquisition deferred income tax assets for U.S. net operating loss benefits
were written off due to the limitations related to the change in ownership rules under U.S. tax
law. In addition, valuation allowances have been established against other deferred tax assets for
which realization is not likely, primarily in the U.S.
Under purchase accounting, the total of these charges resulted in a decrease to deferred tax assets
and an increase to goodwill of approximately $531 million.
Intangible Assets
Intangible assets were stepped up approximately $402 million due primarily to the value assigned
to customer related intangibles (with the offset recorded to goodwill.) As a result, amortization
expense for the year increased by approximately $32 million.
Benefit Obligations
Celanese Corporation’s estimate of pension and other postretirement benefit obligations has
been reflected in the allocation of the purchase price at the projected benefit obligation less plan
assets at fair market value.
Under SFAS 87, pensions and postretirement (OPEB) liabilities are required to be recorded at
their fair market value. The fair market value was determined by outside actuaries. As a result, for
each legal entity that had a pension/OPEB plan, the liability was stepped up by approximately 84 %
of the actuarially determined amount with the corresponding offset recorded to goodwill. Follow-
ing the internal restructuring, the remaining approximate 16 % was stepped up for CAC pensions
and OPEB plans only. Celanese Corporation’s pension liability was stepped up approximately
$232 million due to purchase accounting adjustments resulting in a corresponding increase to
goodwill. By stepping up the liability to fair market value, any unrecognized items (amortized into
expense over the service period due to the rules of SFAS 87, such as unrecognized prior service
cost, unrecognized actuarial loss and unrecognized net transition obligations) were eliminated.
Therefore, in 2004, expense (for these “amortized items”) was reduced due to the application of
purchase accounting.

8. Pu R ChA SE ACCO u N T I N g ANALySIS – ACq u ISI T I O N O F CEL AN E SE Ag
Other Current Liabilities
In connection with the acquisition, at the acquisition date, Celanese Corporation began formu-
lating a plan to exit or restructure certain activities. The company recorded initial liabilities of
$60 million, primarily for employee severance and related costs in connection with the prelimi-
nary plan, as well as approving the continuation of all existing Predecessor restructuring and exit
plans. These costs were driven by the announced restructuring of the Acetate Products business
in the fourth quarter of 2004 related to the shutdown of tow production facilities and the deci-
sion to discontinue the production of acetate filament. The offset to these liabilities was recorded
to goodwill.

9. Celanese Corporation
1601 West LBJ Freeway
Dallas, Texas 75234-6034
USA
Phone +1-972-443-4000
www.celanese.com