Document:

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                                                                  EXHIBIT 10.56
                       AMENDMENT NO. 6 TO CREDIT AGREEMENT

         AMENDMENT dated as of October 30, 2000 (the "AMENDMENT") to the
Revolving Credit and Guaranty Agreement dated as of May 4, 2000 and amended as
of May 15, 2000, June 1, 2000, August 31, 2000 and October 6, 2000 (as so
amended, the "CREDIT AGREEMENT") among LAROCHE INDUSTRIES INC. (the "BORROWER"),
LAROCHE FORTIER INC. (the "GUARANTOR"), the LENDERS party thereto (the "DIP
LENDERS") and THE CHASE MANHATTAN BANK, as Agent (the "AGENT").

                                   WITNESSETH:

         WHEREAS, the parties to the Credit Agreement have agreed to amend the
Credit Agreement as provided for herein to, among other things, permit limited
additional borrowings subsequent to the receipt of expected net proceeds of the
sale of certain assets;

         NOW, THEREFORE, the parties hereto agree as follows:

         SECTION 1. DEFINITIONS; REFERENCES. Unless otherwise specifically
defined herein, each term used herein that is defined in the Credit Agreement
shall have the meaning assigned to such term in the Credit Agreement. Each
reference to "hereof", "hereunder", "herein" and "hereby" and each other similar
reference and each reference to "this Agreement" and each other similar
reference contained in the Credit Agreement shall, from and after the date of
effectiveness of this Amendment, refer to the Credit Agreement as amended
hereby.

         SECTION 2. MANDATORY PREPAYMENT, COMMITMENT REDUCTION AND TERMINATION.
Section 2.13 of the Credit Agreement is hereby amended by:

         (a) deleting the last sentence of paragraph (a) thereof and
substituting therefor the following sentence:

                  "Any reduction of the Total Commitments pursuant to this
                  paragraph shall be applied FIRST to reduce the Tranche B Total
                  Commitments, until such Tranche B Total Commitments have been
                  reduced to zero, and second (i) in the case of Net Proceeds
                  received in connection with the sale of the Nitrogen
                  Manufacturing Assets (the "NITROGEN SALE PROCEEDS"), (A) to
                  immediately reduce the Tranche A Total Commitments, until such
                  Tranche A Total Commitments have been reduced to $10,000,000,
                  and (B) on the date that is thirty (30) days after the date of
                  receipt of such Nitrogen Sale Proceeds (which date may be
                  extended by the Required DIP Lenders in writing in their sole
                  discretion), to reduce the remaining Tranche A Total
                  Commitments by that portion of the Nitrogen Sale Proceeds, if
                  any, not previously applied to reduce the Tranche A Total
                  Commitments pursuant to

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                  clause (A) above, until such remaining Tranche A Total
                  Commitments have been reduced to zero, and (ii) in any other
                  case, to immediately reduce the Tranche A Total Commitments,
                  until such Tranche A Total Commitments have been reduced to
                  zero."; and

         (b) adding, at the end of paragraph (b) thereof but before the period,
the following proviso:

                  "; PROVIDED, HOWEVER, that solely for purposes of this
                  paragraph (b), any reduction in the Total Commitments effected
                  pursuant to clause (i)(B) of paragraph (a) above shall be
                  deemed to have occurred on the date of receipt of the Nitrogen
                  Sale Proceeds.".

         SECTION 3. EFFECTIVENESS. This Amendment shall become effective if and
only if the Agent shall have received duly executed counterparts hereof signed
by each of the Borrower, the Agent, the Guarantor and the Required DIP Lenders
(or, in the case of any party as to which an executed counterpart shall not have
been received, the Agent shall have received telegraphic, telex or other written
confirmation from such party of execution of a counterpart hereof by such
party).

         SECTION 4. GOVERNING LAW. This Amendment shall be governed by and
construed in accordance with the laws of the State of New York.

         SECTION 5. COUNTERPARTS. This Amendment may be signed in any number of
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

                                        2
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         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed by their respective authorized officers as of the day and year
first above written.

                                                       LAROCHE INDUSTRIES INC.

                                                       By:______________________
                                                          Name:
                                                          Title:

                                                       LAROCHE FORTIER INC.

                                                       By:______________________
                                                          Name:
                                                          Title:

                                                       THE CHASE MANHATTAN BANK,
                                                      as Agent and as DIP Lender

                                                       By:______________________
                                                          Name:
                                                          Title:

                                                       HIBERNIA NATIONAL BANK

                                                       By:______________________
                                                          Name:
                                                          Title:

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                                                       WACHOVIA BANK, N.A.

                                                       By:______________________
                                                          Name:
                                                          Title:

                                                       THE BANK OF NOVA SCOTIA

                                                       By:______________________
                                                          Name:
                                                          Title:

                                                       PERRY CAPITAL LLC

                                                       By:______________________
                                                          Name:
                                                          Title:

                                                       AMSOUTH BANK

                                                       By:______________________
                                                          Name:
                                                          Title:

<PAGE>
                                                   BHF (USA) CAPITAL CORPORATION

                                                   By:__________________________
                                                      Name:
                                                      Title:

                                                   By:__________________________
                                                      Name:
                                                      Title:

                                                   COMERICA BANK

                                                   By:__________________________
                                                      Name:
                                                      Title:

                                                   NATIONAL BANK OF CANADA

                                                   By:__________________________
                                                      Name:
                                                      Title:

                                                   BNP PARIBAS

                                                   By:__________________________
                                                      Name:
                                                      Title:<PAGE>

                                                                  EXHIBIT 10.57
                                                                 EXECUTION COPY

                      AMENDMENT NO. 7 TO CREDIT AGREEMENT

         AMENDMENT dated as of November 30, 2000 (the "AMENDMENT") to the
Revolving Credit and Guaranty Agreement dated as of May 4, 2000 and amended as
of May 15, 2000, June 1, 2000, August 31, 2000, October 6, 2000 and October 30,
2000 (as so amended, the "CREDIT AGREEMENT") among LAROCHE INDUSTRIES INC. (the
"BORROWER"), LAROCHE FORTIER INC. (the "GUARANTOR"), the LENDERS party thereto
(the "DIP LENDERS") and THE CHASE MANHATTAN BANK, as Agent (the "AGENT").

                                 WITNESSETH:

         WHEREAS, the parties to the Credit Agreement have agreed to amend
the Credit Agreement as provided for herein to;

         NOW, THEREFORE, the parties hereto agree as follows:

         SECTION 1. DEFINITIONS; REFERENCES. Unless otherwise specifically
defined herein, each term used herein that is defined in the Credit Agreement
shall have the meaning assigned to such term in the Credit Agreement. Each
reference to "hereof", "hereunder", "herein" and "hereby" and each other
similar reference and each reference to "this Agreement" and each other
similar reference contained in the Credit Agreement shall, from and after the
date of effectiveness of this Amendment, refer to the Credit Agreement as
amended hereby.

         SECTION 2. MANDATORY PREPAYMENT, COMMITMENT REDUCTION AND
TERMINATION. Subsection (i)(B) of the final sentence of Section 2.13(a) of
the Credit Agreement is hereby amended by replacing the phrase "thirty (30)"
therein with the phrase "seventy (70)".

         SECTION 3. EFFECTIVENESS. This Amendment shall become effective if
and only if the Agent shall have received duly executed counterparts hereof
signed by each of the Borrower, the Agent, the Guarantor and the Required DIP
Lenders (or, in the case of any party as to which an executed counterpart
shall not have been received, the Agent shall have received telegraphic,
telex or other written confirmation from such party of execution of a
counterpart hereof by such party).

         SECTION 4.  GOVERNING LAW.  This Amendment shall be governed by and
construed in accordance with the laws of the State of New York.

         SECTION 5. COUNTERPARTS. This Amendment may be signed in any number
of counterparts, each of which shall be an original, with the same effect as
if the signatures thereto and hereto were upon the same instrument.

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed by their respective authorized officers as of the day and year
first above written.

                                                 LAROCHE INDUSTRIES INC.

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 LAROCHE FORTIER INC.

                                                 By:____________________________
                                                      Name:
                                                      Title:

                                                 THE CHASE MANHATTAN BANK,
                                                 as Agent and as DIP Lender

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 HIBERNIA NATIONAL BANK

                                                 By:____________________________
                                                    Name:
                                                    Title:

<PAGE>

                                                 WACHOVIA BANK, N.A.

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 THE BANK OF NOVA SCOTIA

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 PERRY CAPITAL LLC

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 AMSOUTH BANK

                                                 By:____________________________
                                                    Name:
                                                    Title:

<PAGE>

                                                 BHF (USA) CAPITAL CORPORATION

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 COMERICA BANK

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 NATIONAL BANK OF CANADA

                                                 By:____________________________
                                                    Name:
                                                    Title:

                                                 BNP PARIBAS

                                                 By:____________________________
                                                    Name:
                                                    Title:

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