Document:

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                                                                    Exhibit 10.3

                                SECOND AMENDMENT

          SECOND AMENDMENT (this "AMENDMENT"), dated as of May 24, 2004, among
BCP CRYSTAL HOLDINGS LTD. 2, a company incorporated with limited liability under
the laws of the Cayman Islands ("HOLDINGS"), BCP CAYLUX HOLDINGS LUXEMBOURG
S.C.A., a corporation partnership limited by shares (societe en commandite par
actions) organized under the laws of Luxembourg ("PARENT"), CELANESE AMERICAS
CORPORATION, a Delaware corporation ("CAC"), the lenders party to the Credit
Agreement referred to below from time to time (the "LENDERS"), MORGAN STANLEY
SENIOR FUNDING, INC. ("MORGAN STANLEY"), as global coordinator (the "GLOBAL
COORDINATOR"), DEUTSCHE BANK AG, NEW YORK BRANCH, as administrative agent (in
such capacity, the "ADMINISTRATIVE AGENT") and as collateral agent (in such
capacity, the "COLLATERAL AGENT") for the Lenders, and DEUTSCHE BANK SECURITIES
INC. and MORGAN STANLEY SENIOR FUNDING, INC., as joint lead arrangers (in such
capacity, the "JOINT LEAD ARRANGERS"). Unless otherwise indicated, all
capitalized terms used herein and not otherwise defined shall have the
respective meanings provided such terms in the Credit Agreement referred to
below.

                              W I T N E S S E T H :

          WHEREAS, Holdings, Parent, CAC, certain subsidiaries of Parent from
time to time party thereto as a borrower under the Revolving Facility provided
for therein (in such capacity, the "SUBSIDIARY REVOLVING Borrowers"), the
Lenders, the Global Coordinator, the Agents and the Joint Lead Arrangers are
parties to a Credit Agreement, dated as of April 6, 2004 (as amended, modified
or supplemented to the date hereof, the "CREDIT AGREEMENT"); and

          WHEREAS, subject to and on the terms and conditions set forth herein,
the parties hereto wish to amend the Credit Agreement, as provided below;

          NOW, THEREFORE, it is agreed:

          1.   Notwithstanding any provision of the Credit Agreement to the
contrary, (i) requests for Letters of Credit may be given by any Loan Party (on
its own behalf or on behalf of any other Loan Party, in each case to the extent
such Person is entitled to have the requested Letter of Credit opened for its
account), (ii) a Letter of Credit, although opened for the account of a Loan
Party entitled to have such Letter of Credit opened for its own account, may be
stated to be issued on behalf of another Subsidiary, (iii) Letters of Credit
(including Existing Letters of Credit) shall include bank guarantees and (iv)
Letters of Credit denominated in Canadian dollars may be issued thereunder up to
an aggregate stated amount not in excess of 35 million Canadian dollars, which
all computations of outstandings to be made by including the Dollar equivalent
of the stated amount of such Canadian dollar denominated Letters of Credit by
reference to an Exchange Rate set on each Reset Date.

          2.   This Amendment is limited as specified and shall not constitute a
modification, acceptance or waiver of any other provision of the Credit
Agreement or any other Credit Document.

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          3.   This Amendment may be executed in any number of counterparts and
by the different parties hereto on separate counterparts, each of which
counterparts when executed and delivered shall be an original, but all of which
shall together constitute one and the same instrument. A complete set of
counterparts shall be lodged with the Term Borrower and the Administrative
Agent.

          4.   THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE
STATE OF NEW YORK.

          5.   This Amendment shall become effective on the date (the "AMENDMENT
EFFECTIVE DATE") when each of Holdings, the Term Borrower, CAC and the Required
Lenders shall have signed a counterpart hereof (whether the same or different
counterparts) and shall have delivered (including by way of facsimile
transmission) the same to White & Case LLP, 1155 Avenue of the Americas, New
York, NY 10036 Attention: Denise A. Diallo (facsimile number 212-354-8113).

          6.   From and after the Amendment Effective Date, all references to
the Credit Agreement in the Credit Agreement and the other Credit Documents
shall be deemed to be references to the Credit Agreement as modified hereby.

                                      * * *

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          IN WITNESS WHEREOF, each of the parties hereto has caused a
counterpart of this Amendment to be duly executed and delivered as of the date
first above written.

                         BCP CRYSTAL HOLDINGS LTD. 2

                         By: /s/ Anjan Mukherjee
                         -------------------------------
                         Name: Anjan Mukherjee
                         Title: Director

                         BCP CAYLUX HOLDINGS LUXEMBOURG
                         S.C.A.

                         By its Manager, BCP CAYLUX HOLDINGS
                         LTD. 1

                         By: /s/ Anjan Mukherjee
                         --------------------------------------
                         Name: Anjan Mukherjee
                         Title: Director

                         CELANESE AMERICAS CORPORATION

                         By: /s/ Michael E. Grom
                         ---------------------------------------
                         Name: Michael E. Grom
                         Title: Vice President - Finance,
                         Principal Financial Officer & Treasury

                         By: /s/ Julie K. Chapin
                         ---------------------------------------
                         Name: Julie K. Chapin
                         Title: Vice President - Law, Principal
                         Executive Officer & Secretary

                         DEUTSCHE BANK AG, NEW YORK BRANCH,
                         as Administrative Agent and as Lender

                         By: /s/ Carin M. Keegan
                         -------------------------------------
                         Name: Carin M. Keegan
                         Title: Vice President

                         By: /s/ Scottye Lindsey
                         -------------------------------------
                         Name: Scottye Lindsey
                         Title: Director

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                         MORGAN STANLEY SENIOR FUNDING, INC.,
                         as Global Coordinator and as Lender

                         By: /s/ Eugene F. Martin
                         -------------------------------------
                         Name: Eugene F. Martin
                         Title: Vice President

                         DEUTSCHE BANK AG, CAYMAN ISLANDS
                         BRANCH, solely as Deposit Bank

                         By: /s/ Carin M. Keegan
                         -----------------------------------
                         Name: Carin M. Keegan
                         Title: Vice President

                         By: /s/ Scottye Lindsey
                         -----------------------------------
                         Name: Scottye Lindsey
                         Title: Director

                         DEUTSCHE BANK AG, NEW YORK BRANCH,
                         as Administrative Agent and as Lender

                         By: /s/ Carin M. Keegan
                         -----------------------------------
                         Name: Carin M. Keegan
                         Title: Vice President

                         By: /s/ Scottye Lindsey
                         -----------------------------------
                         Name: Scottye Lindsey
                         Title: Director

                         MORGAN STANLEY SENIOR FUNDING, INC.,
                         as Global Coordinator and as Lender

                         By: /s/ Eugene F. Martin
                         -----------------------------------
                         Name: Eugene F. Martin
                         Title: Vice President

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                         DEUTSCHE BANK AG, CAYMAN ISLANDS
                         BRANCH, solely as Deposit Bank

                         By: /s/ Carin M. Keegan
                         -----------------------------------
                         Name: Carin M. Keegan
                         Title: Vice President

                         By: /s/ Scottye Lindsey
                         -----------------------------------
                         Name: Scottye Lindsey
                         Title: Director

                                       -5-<Page>

                                                                    EXHIBIT 10.4

                                 THIRD AMENDMENT

          THIRD AMENDMENT (this "AMENDMENT"), dated as of June 4, 2004, among
BCP CRYSTAL HOLDINGS LTD. 2, a company incorporated with limited liability under
the laws of the Cayman Islands ("HOLDINGS"), BCP CAYLUX HOLDINGS LUXEMBOURG
S.C.A., a corporate partnership limited by shares (societe en commandite par
actions) organized under the laws of Luxembourg ("PARENT"), CELANESE AMERICAS
CORPORATION, a Delaware corporation ("CAC"), the lenders party to the Credit
Agreement referred to below from time to time (the "LENDERS"), MORGAN STANLEY
SENIOR FUNDING, INC. ("MORGAN STANLEY"), as global coordinator (the "GLOBAL
COORDINATOR"), DEUTSCHE BANK AG, NEW YORK BRANCH, as administrative agent (in
such capacity, the "ADMINISTRATIVE AGENT") and as collateral agent (in such
capacity, the "COLLATERAL AGENT") for the Lenders, and DEUTSCHE BANK SECURITIES
INC. and MORGAN STANLEY SENIOR FUNDING, INC., as joint lead arrangers (in such
capacity, the "JOINT LEAD ARRANGERS"). Unless otherwise indicated, all
capitalized terms used herein and not otherwise defined shall have the
respective meanings provided such terms in the Credit Agreement referred to
below.

                              W I T N E S S E T H :

          WHEREAS, Holdings, Parent, CAC, certain subsidiaries of Parent from
time to time party thereto as borrowers under the Revolving Facility provided
for therein (in such capacity, the "SUBSIDIARY REVOLVING Borrowers"), the
Lenders, the Global Coordinator, the Agents and the Joint Lead Arrangers are
parties to a Credit Agreement, dated as of April 6, 2004 (as amended, modified
or supplemented to the date hereof, the "CREDIT AGREEMENT"); and

          WHEREAS, subject to and on the terms and conditions set forth herein,
the parties hereto wish to amend the Credit Agreement, as provided below;

          NOW, THEREFORE, it is agreed:

          1.   Section 1.01 of the Credit Agreement is hereby amended by (x)
deleting the definition of "Maximum Dollar Term Amount", (y) revising the
following definitions in their entirety to read:

          "ABR TERM LOAN" shall mean any Dollar Term Loan bearing interest at a
     rate determined by reference to the Alternate Base Rate in accordance with
     the provisions of Article II.

          "APPROVED FUND" shall mean any person (other than a natural person)
     that is engaged in making, purchasing, holding or investing in bank loans
     and similar extensions of credit in the ordinary course and that is
     administered, managed or advised by a Lender, an Affiliate of a Lender or
     an entity (including an investment advisor) or an Affiliate of such entity
     that administers, manages or advises a Lender.

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          "BORROWING MINIMUM" shall mean (a) in the case of a CL Borrowing, a
     Term Borrowing and/or a Revolving Facility Borrowing denominated in
     Dollars, $5.0 million, (b) in the case of a Term Borrowing or Revolving
     Facility Borrowing denominated in Euros, EURO 3.0 million, (c) in the case
     of a Swingline Dollar Borrowing, $500,000 and (d) in the case of a
     Swingline Euro Borrowing, EURO 500,000.

          "BORROWING MULTIPLE" shall mean (a) in the case of a CL Borrowing, a
     Term Borrowing or a Revolving Borrowing denominated in Dollars, $1.0
     million, (b) in the case of a Term Borrowing or Revolving Borrowing
     denominated in Euros, EURO 600,000, (c) in the case of a Swingline Dollar
     Borrowing, $500,000 and (d) in the case of a Swingline Euro Borrowing, EURO
     500,000.

          "MAJORITY LENDERS" (i) for any Facility other than the Term Loan
     Facility shall mean, at any time, Lenders under such Facility having Loans
     and unused Commitments representing more than 50% of the sum of all Loans
     outstanding under such Facility and unused Commitments under such Facility
     at such time and (ii) for the Term Loan Facility, (x) Lenders having Dollar
     Loans and Term Loan Commitments (Dollars) representing more than 50% of the
     sum of all Dollar Loans and Term Loan Commitments (Dollars) and/or (y)
     Lenders having Euro Term Loans and Term Loan Commitments (Euros)
     representing more than 50% of the Euro Term Loans and Term Loan Commitments
     (Euros).

          "TERM LOAN" shall mean each of the term loans made to the Term
     Borrower pursuant to Section 2.01(a) or Section 2.22. Each Term Loan shall
     be (x) a Eurocurrency Loan or an ABR Loan and (y) a Dollar Term Loan or a
     Euro Term Loan.

          "TERM LOAN COMMITMENT" shall mean, at any time, with respect to each
     Lender such Lender's Term Loan Commitment (Dollars) (if any) and Term Loan
     Commitment (Euros) if any.

          "TYPE", when used in respect of any Loan or Borrowing, shall refer to
     the Rate by reference to which interest on such Loan or on the Loans
     comprising such Borrowing is determined. For purposes hereof, the term
     "RATE" shall include the Adjusted LIBO Rate and the Alternate Base Rate,
     provided that Dollar Term Loans and Euro Term Loans shall be of a different
     Type.

and (z) inserting the following new definitions in appropriate alphabetical
order.

          "AGREED EXCHANGE RATE" shall mean 1.21523.

          "DOLLAR TERM LOAN" shall mean each Term Loan (x) outstanding on the TA
     Effective Date and denominated in Dollars, (y) made after the TA Effective
     Date under Section 2.01(a) pursuant to utilization of Term Loan Commitments
     (Dollars) and (z) made pursuant to Section 2.22 as a Dollar Term Loan.

          "EURO TERM LOAN" shall mean each Term Loan (x) outstanding on the TA
     Effective Date and denominated in Euros, (y) made after the TA Effective
     Date under

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     Section 2.01(a) pursuant to utilization of Term Loan Commitments (Euros)
     and (z) made pursuant to Section 2.22 as a Euro Term Loan.

          "MAXIMUM TERM AMOUNT" shall mean at any time (i) the initial aggregate
     principal amount of all Dollar Term Loans then or theretofore made pursuant
     to Section 2.01(a) and, if the Increased Amount Date has occurred, pursuant
     to Section 2.22 plus (ii) the initial aggregate principal amount of all
     Euro Term Loans then or theretofore made pursuant to Section 2.01(a) and,
     if the Increased Amount Date has occurred, pursuant to Section 2.22,
     divided by the Agreed Exchange Rate.

          "TA EFFECTIVE DATE" shall mean the Effective Date under and as defined
     in the Third Amendment.

          "TA EFFECTIVE TIME" shall mean 11:00 A.M. (New York time) on the TA
     Effective Date.

          "THIRD AMENDMENT" shall mean the Third Amendment dated as of June ___,
     2004 to this Agreement.

          "TERM LOAN COMMITMENT (DOLLARS)" shall mean, with respect to each
     Lender, the Commitment (if any) of such Lender to make term loans under
     Section 2.01(a) that will be Dollar Term Loans in the amount set forth
     opposite such Lender's name on SCHEDULE 2.01 directly below the column
     entitled "Term Loan Commitment (Dollars)" or in the Assignment and
     Acceptance pursuant to which such Lender shall have assumed its Term Loan
     Commitment (Dollars), as applicable. The aggregate Term Loan Commitments
     (Dollars) as of the TA Effective Time shall equal $455,711,250, which
     amount shall be reduced on the TA Effective Date by the $224,356,687.50 of
     Dollar Term Loans outstanding on such date after (i) the incurrence at the
     opening of business on such date of additional Term Loans and (ii) the
     conversion of certain Term Loans into Euro Term Loans on such date as
     provided in Section 2.01(a).

          "TERM LOAN COMMITMENT (EUROS)" shall mean, with respect to each
     Lender, the commitment (if any) of such Lender to make term loans under
     Section 2.01(a) that will be Euro Term Loans in the amount set forth
     opposite such Lender's name on SCHEDULE 2.01 directly below the column
     entitled "Term Loan Commitment (Euros)" or in the Assignment and Acceptance
     pursuant to which such Lender shall have assumed its Term Loan Commitment
     (Euros). The aggregate Term Loan Commitments (Euro) as of the TA Effective
     Time shall equal EURO 125 million, which amount shall be reduced on the TA
     Effective Date by the EURO 61,540,253.70 of Euro Term Loans resulting from
     the conversion of Term Loans on such date as provided in Section 2.01(a).

          "TL BORROWING RATIO" shall mean at any time the ratio of (A) an amount
     equal to (i) the aggregate Term Loan Commitments (Dollars) on the TA
     Effective Date times the Agreed Exchange Rate divided by (ii) the aggregate
     Term Loan Commitments (Euros) on the TA Effective Date) to (B) 1.00.

          "TL REPAYMENT RATIO" shall mean at any time the ratio of (A) the
     amount equal to (x) the aggregate principal amount of Dollar Term Loans
     then outstanding times the

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     Agreed Exchange Rate divided by (y) the aggregate principal amount of Euro
     Term Loans then outstanding to (B) 1.00.

          2.   Section 1.01 of the Credit Agreement is hereby further amended by
(x) revising the following definitions in their entirety:

          "APPLICABLE CL MARGIN" shall mean (x) for any day not in a Reduction
     Period, 2.50% per annum and (y) for any day in a Reduction Period, 2.25%
     per annum.

          "APPLICABLE MARGIN" shall mean with respect to (i) any Eurocurrency
     Loan (x) for any day not occurring in a Reduction Period, 2.50% per annum
     and (y) for any day occurring in a Reduction Period, 2.25% per annum, and
     (ii) any ABR Loan (x) for any day not occurring in a Reduction Period,
     1.50% per annum and (y) for any day occurring in a Reduction Period, 1.25%.

and (y) inserting the following new definition in appropriate alphabetical
order:

          "REDUCTION PERIOD" shall mean any fiscal quarter if the Total Leverage
     Ratio on the last day of the immediately preceding fiscal quarter was less
     than 2.75 to 1.00 but only to the extent that the Term Borrower shall have
     delivered to the Administrative Agent within 45 days after such last day a
     certificate of a Financial Officer of the Term Borrower setting forth
     computations in reasonable detail satisfactory to the Administrative Agent
     showing that the Total Leverage Ratio was less than 2.75 to 1.00 on such
     last day.

          3.   Section 1.01 of the Credit Agreement is hereby further amended by
(x) revising the following definition in its entirity to read:

          "REQUIRED LENDERS" shall mean, at any time, Lenders having (a) Term
     Loan Exposures, (b) Revolving Facility Credit Exposures, (c) Available
     Revolving Unused Commitments (if prior to the termination thereof) and (d)
     Credit-Linked Commitments (or after the termination thereof, CL Percentages
     of the CL Exposure) that taken together, represent more than 50% of the sum
     of (w) all Term Loan Exposures, (x) all Revolving Facility Credit
     Exposures, (y) the total Available Revolving Unused Commitments (if prior
     to the termination thereof) and (z) the Total Credit-Linked Commitment (or
     after the termination thereof, the CL Exposure) at such time. The Term Loan
     Exposure, Revolving Facility Credit Exposure, Available Revolving Unused
     Commitment and Credit-Linked Commitment of any Defaulting Lender shall be
     disregarded in determining Required Lenders at any time.

and (y) inserting the following definition in appropriate alphabetical order:

          "TERM LOAN EXPOSURE" shall mean, at any time, the sum of (a) the
     aggregate principal amount of the Dollar Term Loans outstanding at such
     time, (b) the Dollar Equivalent of the aggregate principal amount of the
     Euro Term Loans outstanding at such time and, to the extent the Term Loan
     Commitments have not been terminated, (c) the aggregate Term Loan
     Commitments (Dollars) and (d) the Dollar Equivalent of the aggregate Term
     Loan Commitments (Euros), at the time. The Term Loan Exposure of

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     any Lender at any time shall be the sum of (a) the aggregate principal
     amount of such Lender's Dollar Term Loans outstanding at such time, (b) the
     Dollar Equivalent of the aggregate principal amount of such Lender's Euro
     Term Loans outstanding at such time and, to the extent the Term Loan
     Commitment of such Lender has not been terminated, (c) such Lender's Term
     Loan Commitment (Dollars) and (d) the Dollar Equivalent of such Lender's
     Term Loan Commitment (Euros) at such time.

          4.   Section 1.03(b) of the Credit Agreement is hereby amended by
revising such Section in its entirety to read:

          "(b) Not later than 5:00 p.m., New York City time, on each Reset Date,
     the Administrative Agent shall (i) determine the aggregate amount of the
     Dollar Equivalents of (x) the Euro Term Loans then outstanding and the Term
     Loan Commitments (Euros) on such date and (y) the principal amounts of the
     Revolving Loans and Swingline Loans denominated in Euros then outstanding
     (after givng effect to any Euro Term Loans or Revolving Loans and/or
     Swingline Loans denominated in Euros made or repaid on such date), the
     Revolving L/C Exposure and the CL Exposure and (ii) notify the Lenders,
     each Issuing Bank and the Term Borrower of the results of such
     determination."

          5.   Section 2.01 of the Credit Agreement is hereby amended (x) by
revising Section 2.01(a) in its entirety to read:

          "(a) to make term loans to the Term Borrower in Dollars (if made
     pursuant to a Term Loan Commitment (Dollars)) or Euros (if made pursuant to
     a Term Loan Commitment (Euros)) from time to time after the TA Effective
     Date and during the Term Availability Period in an amount not to exceed its
     Term Loan Commitment at such time (it being agreed that prior to the TA
     Effective Time $299,142,250 principal amount of Term Loans had been
     borrowed (all of which remain outstanding as of the TA Effective Time)),
     PROVIDED that (i) all such incurrences of Term Loans will result in Dollar
     Term Loans and Euro Term Loans being incurred in accordance with the TL
     Borrowing Ratio, (ii) any Term Loan that is repaid may not be reborrowed
     and (iii) $74,785,562.50 of the Term Loans outstanding as of the TA
     Effective Time (and held by Term Lenders with Term Loan Commitments (Euros)
     (effective on the TA Effective Date)) will be converted into EURO
     61,540,253.70 of Euro Term Loans while the remaining $224,356,687.50 of
     such Term Loans (and held by Lenders with Term Loan Commitments (Dollars))
     will remain outstanding as Dollar Term Loans;"

and (y) adding after the reference to "Agreement" in Section 2.01(d) an "(i)"
and adding at the end of such Section "and (ii) no Euro Term Loan or Dollar Term
Loan may be converted into a Dollar Term Loan or Euro Term Loan, respectively".

          6.   Section 2.03 of the Credit Agreement is hereby amended by
deleting in the third to last sentence thereof the references to "(i)" and to
"and (ii) is being requested by a Foreign Revolving Borrower".

          7.   Section 2.08(b) of the Credit Agreement is hereby amended by (x)
adding after the reference to "each such reduction" the phrase "of an amount
denominated in Dollars"

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and (y) changing the phrase "and (ii)" in said Section to read ", (ii) the Term
Loan Commitment (Dollars) and Term Loan Commitments (Euros) shall be reduced on
a pro rata basis and (iii)".

          8.   Section 2.09 of the Credit Agreement is hereby amended by
changing the reference to "(ii) in Dollars" in the first sentence thereof to
read "(ii) in Euros or Dollars, as applicable,".

          9.   Section 2.10 of the Credit Agreement is hereby amended by (i)
deleting the reference in clause (a) thereof to "in Dollars," (ii) adding after
the first reference to "Term Loans" in said clause (a) the phrase "(such
repayment to be in Dollars if made in respect of Dollar Term Loans or in Euros
if made in respect of Euro Term Loans)," (iii) changing the reference to
"Maximum Dollar Term Amount" to "Maximum Term Amount, such prepayment to be made
in accordance with the TL Repayment Ratio," (iv) changing the reference in
clause (c) thereof to "Term Loans on a pro rata basis" to read "Dollar Term
Loans and Euro Term Loans in accordance with the TL Repayment Ratio" and (v)
adding at the end of the first sentence of clause (e) thereof the phrase
"PROVIDED that nothing in this sentence shall modify the requirement that all
repayments of Term Loans shall be made with respect to the Dollar Term Loans and
Euro Term Loans in accordance with the TL Repayment Ratio."

          10.  Section 2.11(a) of the Credit Agreement is hereby amended by (x)
inserting an "(i)" after the reference to "provided that" and (y) adding at the
end of said Section "and (ii) all such prepayments shall be made with respect to
the Dollar Term Loans and the Euro Term Loans in accordance with the TL
Repayment Ratio."

          11.  Section 2.23(a) of the Credit Agreement is hereby amended by (x)
inserting "any Euro Term Loan," after the reference therein to "make or
maintain", (y) inserting "Euro Term Loans," after the reference therein to "make
or continue" and (z) inserting after the reference to "prepay such" in the
second sentence thereof the phrase "Euro Term Loan,".

          12.  The last sentence of Section 6.02 is hereby amended by adding a
"(b)" prior to the reference therein to "(d)".

          13.  Section 9.04 of the Credit Agreement is hereby amended by (i)
adding (I) after the reference to "(x) $5.0 million" in Section 9.04(b), the
phrase "(or the Euro Equivalent in the case of Revolving Facility Loans
denominated in Euros)", (II) after the reference in such Section to "(z) $1.0
million" the phrase "(or the Euro Equivalent in the case of Euro Term Loans and
Loan Commitments (Euros))" and (III) after the reference to "Term Loans" in such
Section the phrase "and Term Loan Commitments"; (ii) deleting the "and" after
Section 9.04(b)(ii)(C); (iii) changing the period at the end of Section
9.04(b)(ii)(D) to "; and"; (iv) inserting a new Section 9.04(b)(ii)(E) to read:

          "(E) no assignments of Euro Term Loans or Term Loan Commitments
     (Euros) shall be permitted to be made to an assignee that cannot make Euro
     Term Loans.";

(v) inserting a "(i)" after "including" in Section 9.04(d); and (vi) inserting
after the reference to "Federal Reserve Bank" in Section 9.04(d) the following
phrase: "and (ii) in the case of any Lender that is an Approved Fund, any pledge
or assignment to any holders of obligations owed,

                                       -6-
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or securities issued, by such Lender including to any trustee for, or any other
representative of, such holders"

          14.  Schedule 2.01 to the Credit Agreemnt is hereby replaced by a new
Schedule 2.01 attached hereto as Annex I.

          15.  Section 5.02 of the U.S. Collateral Agreement is hereby amended
by adding after the reference to "paid in full" in clause THIRD therein the
phrase "to the collateral agent for the lenders party to the Term Loan C
Financing if such collateral agent holds a Lien on any or all of the Collateral
or, if such other Lien does not exist,".

          16.  Section 4.02 of the Guarantee and Pledge Agreement executed by
Holdings and the Intermediate Holdcos is hereby amended by adding after the
reference to "THIRD" therein the phrase "to the collateral agent for the lenders
party to the Term Loan C Financing if such collateral agent holds a Lien on any
or all of the Collateral or, if such other Lien does not exist", it being agreed
that comparable changes will be made to the Luxembourg law pledges of the
Parent's equity interests included in the defined term "Holdings Agreements".

          17.  The Parent Guaranty and Pledge Agreement is hereby amended by (i)
revising the definition therein of "Guaranteed Obligations" in its entirety to
read:

               "GUARANTEED OBLIGATIONS" means all Obligations owing by (x) each
     of the Specified Borrowers and (y) if Parent remains the parent of US
     Holdco on the Restructuring Date, US Holdco.

, (ii) changing the reference to "Parent" in the definition therein of "Noticed
Event of Default" to read "Term Borrower" and (z) adding after the reference to
"THIRD" in Section 4.02 the phrase "to the collateral agent for the lenders
party to the Term Loan C Financing if such collateral agent holds a Lien on any
or all of the Collateral or, if such other Lien does not exist".

          18.  In order to induce the Lenders to enter into this Amendment, the
Term Borrower hereby represents and warrants that (i) each of the
representations and warranties contained in Article III of the Credit Agreement
are true and correct in all material respects on the Effective Date (as defined
below), both before and after giving effect to this Amendment, except to the
extent such representations and warranties expressly relate to an earlier date
(in which case such representations and warranties shall be true and correct in
all material respects as of such earlier date) and (ii) there exists no Default
or Event of Default on the Effective Date, both before and after giving effect
to this Amendment.

                                       -7-
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          19.  This Amendment is limited as specified and shall not constitute a
modification, acceptance or waiver of any other provision of the Credit
Agreement or any other Credit Document.

          20.  This Amendment may be executed in any number of counterparts and
by the different parties hereto on separate counterparts, each of which
counterparts when executed and delivered shall be an original, but all of which
shall together constitute one and the same instrument. A complete set of
counterparts shall be lodged with the Term Borrower and the Administrative
Agent.

          21.  THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE
STATE OF NEW YORK.

          22.  This Amendment shall become effective on the date (the "EFFECTIVE
DATE") when each of Holdings, the Term Borrower, CAC and the Required Lenders
shall have signed a counterpart hereof (whether the same or different
counterparts) and shall have delivered (including by way of facsimile
transmission) the same to White & Case LLP, 1155 Avenue of the Americas, New
York, NY 10036 Attention: Denise A. Diallo (facsimile number 212-354-8113)
provided that (i) Sections 1, 5 and 8 shall not become effective unless each
Term Lender has signed and so returned a counterpart hereof and (ii) Section 2
and 3 shall each not become effective unless each Lender adversely affected by
such Sections has signed and so delivered a counterpart hereof.

          23.  From and after the Effective Date, all references to the Credit
Agreement in the Credit Agreement and the other Credit Documents shall be deemed
to be references to the Credit Agreement as modified hereby.

                                      * * *

                                       -8-
<Page>

          IN WITNESS WHEREOF, each of the parties hereto has caused a
counterpart of this Amendment to be duly executed and delivered as of the date
first above written.

                             BCP CRYSTAL HOLDINGS LTD. 2

                             By: /s/ Anjan Mukherjee
                             --------------------------------------
                             Name: Anjan Mukherjee
                             Title: Director

                             BCP CAYLUX HOLDINGS LUXEMBOURG
                             S.C.A.

                             By its Manager, BCP CAYLUX HOLDINGS
                             LTD. 1

                             By: /s/ Anjan Mukherjee
                             --------------------------------------
                             Name: Anjan Mukherjee
                             Title: Director

                             CELANESE AMERICAS CORPORATION

                             By: /s/ Michael E. Grom
                             --------------------------------------
                             Name: Michael E. Grom
                             Title: Vice President - Finance,
                             Principal Financial Officer & Treasurer

                             By: /s/ Julie K. Chapin
                             --------------------------------------
                             Name: Julie K. Chapin
                             Title: Vice President - Law, Principal
                             Executive Officer & Secretary

                             DEUTSCHE BANK AG, NEW YORK BRANCH,
                             as Administrative Agent and as Lender

                             By: /s/ Carin M. Keegan
                             --------------------------------------
                             Name: Carin M. Keegan
                             Title: Vice President

                             By: /s/ Diane F. Rolfe
                             --------------------------------------
                             Name: Diane F. Rolfe
                             Title: Vice President

                                       -9-
<Page>

                             MORGAN STANLEY SENIOR FUNDING, INC.,
                             as Global Coordinator and as Lender

                             By: /s/ Eugene F. Martin
                             --------------------------------------
                             Name: Eugene F. Martin
                             Title: Vice President

                             DEUTSCHE BANK AG, CAYMAN ISLANDS
                             BRANCH, solely as Deposit Bank

                             By: /s/ Carin M. Keegan
                             --------------------------------------
                             Name: Carin M. Keegan
                             Title: Vice President

                             By: /s/ Diane F. Rolfe
                             --------------------------------------
                             Name: Diane F. Rolfe
                             Title: Vice President

                             DEUTSCHE BANK AG, NEW YORK BRANCH,
                             as Administrative Agent and as Lender

                             By: /s/ Carin M. Keegan
                             --------------------------------------
                             Name: Carin M. Keegan
                             Title: Vice President

                             By: /s/ Diane F. Rolfe
                             --------------------------------------
                             Name: Diane F. Rolfe
                             Title: Vice President

                             MORGAN STANLEY SENIOR FUNDING, INC.,
                             as Global Coordinator and as Lender
                             By: /s/ Eugene F. Martin
                             --------------------------------------
                             Name: Eugene F. Martin
                             Title: Vice President

                                      -10-
<Page>

                             DEUTSCHE BANK AG, CAYMAN ISLANDS
                             BRANCH, solely as Deposit Bank

                             By: /s/ Carin M. Keegan
                             --------------------------------------
                             Name: Carin M. Keegan
                             Title: Vice President

                             By: /s/ Diane F. Rolfe
                             --------------------------------------
                             Name: Diane F. Rolfe
                             Title: Vice President

                             ABN AMRO BANK N.V., as Documentation
                             Agent and Lender

                             By: /s/ Eric Oppenheimer
                             --------------------------------------
                             Name: Eric Oppenheimer
                             Title: Vice President

                             By: /s/ Nancy W. Lanzoni
                             --------------------------------------
                             Name: Nancy W. Lanzoni
                             Title: Vice President

                             BANK OF AMERICA, N.A., as Documentation
                             Agent

                             By: /s/ Robert Klawinski
                             ---------------------------------------
                             Name: Robert Klawinski
                             Title: Managing Director

                             THE BANK OF NOVA SCOTIA

                             By: /s/ Nadine Bell
                             --------------------------------------
                             Name: Nadine Bell
                             Title: Senior Manager

                             BAYERISCHE HYPO-VEREINSBANK AG

                             By: /s/ Stefan Kruse
                             --------------------------------------
                             Name: Stefan Kruse
                             Title: Senior Vice President

                                      -11-
<Page>

                             COMMERZBANK AG NEW YORK AND GRAND
                             CAYMAN BRANCHES

                             By: /s/ Douglas L. Glickman
                             --------------------------------------
                             Name: Douglas L. Glickman
                             Title: Vice President

                             By: /s/ Charles W. Polet
                             --------------------------------------
                             Name: Charles W. Polet
                             Title: Assistant Treasurer

                             GENERAL ELECTRIC CAPITAL CORPORATION,
                             as Documentation Agent and Lender

                             By: /s/ Kimberly A. Massa
                             ---------------------------------------
                             Name: Kimberly A. Massa
                             Title: Duly Authorized Signatory

                             KfW

                             By: /s/ Stefan Wolf
                             --------------------------------------
                             Name: Stefan Wolf
                             Title: First Vice President

                             By: /s/ Mike Thode
                             --------------------------------------
                             Name: Mike Thode
                             Title: Senior Project Manager

                             MIZUHO CORPORATE BANK, LTD.

                             By: /s/ Kentaro Akashi
                             --------------------------------------
                             Name: Kentaro Akashi
                             Title: DGM

                             BLUE RIDGE INVESTMENTS, LLC

                             By: /s/ George C. Carp
                             --------------------------------------
                             Name: George C. Carp
                             Title: SVP - Finance

                                      -12-
<Page>

                                     ANNEX I

                                                                   SCHEDULE 2.01

<Table>
<Caption>
                                    TERM LOAN                TERM LOAN
          LENDER               COMMITMENT (DOLLARS)      COMMITMENT (EUROS)
---------------------------------------------------------------------------
<S>                            <C>                       <C>
Deutsche Bank AG,              $        455,711,250      EURO   125,000,000
 New York Branch
</Table>

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