Document:

<PAGE>
                                                                   Exhibit 4.1.3

            THIRD SUPPLEMENTAL INDENTURE ("Third Supplemental Indenture"), dated
as of June 10, 2003, among Philipp Brothers Chemicals, Inc., a New York
corporation (the "Company"), each of the Guarantors named herein (including each
Guarantor whose guarantee is confirmed by, or becomes effective pursuant to,
this Third Supplemental Indenture), as guarantors, and JPMorgan Chase Bank, as
successor to The Chase Manhattan Bank, as Trustee (the "Trustee"). All
capitalized terms not otherwise defined herein shall have the meaning assigned
to them in the Indenture (as defined herein).

            WHEREAS, pursuant to a certain Indenture, dated as of June 11, 1998,
among the Company, the Guarantors named therein and the Trustee (the "Original
Indenture"), the Company issued its 9 7/8% Senior Subordinated Notes due 2008,
Series A and Series B (the "Notes"); and

            WHEREAS, the Original Indenture was amended by a certain First
Supplemental Indenture, dated as of January 15, 1999, among the Company, the
Guarantors named therein and the Trustee (the "First Supplemental Indenture"),
in order to, among other things, effect the exchange of the Exchange Notes in
replacement of the Initial Notes; and

            WHEREAS, the Original Indenture was further amended by a certain
Second Supplemental Indenture, dated as of March 19, 2003, among the Company,
the Guarantors named therein and the Trustee (the "Second Supplemental
Indenture"; the Original Indenture, as amended by the First Supplemental
Indenture and the Second Supplemental Indenture and as otherwise in effect on
the date hereof, the "Indenture"), in order to, among other things, effect
certain amendments relating to two Subsidiaries of the Company, Odda Holdings SA
and Odda Smeltaverk SA; and

            WHEREAS, the Indenture establishes certain conditions, as set forth
in Sections 4.20 and 4.22 thereof, under which Restricted Subsidiaries would be
required to guarantee the obligations of the Company under the Indenture and the
Notes, with: (x) Section 4.20 providing (among other things) that each
Restricted Subsidiary that guarantees any Other Debt of the Company also shall
guarantee, to the same extent, the Company's obligations under the Indenture and
the Notes; and (y) Section 4.22 providing (among other things) that each
Restricted Subsidiary of the Company (other than a Foreign Subsidiary) which,
after the date of the Original Indenture (if not then a Guarantor), becomes a
Restricted Subsidiary shall execute a supplemental indenture to the Indenture
pursuant to which such Restricted Subsidiary would become bound by the Guarantee
of the Notes in the form set forth in the Indenture (without such further
Guarantor being required to execute and deliver the Guarantee endorsed on the
Notes); and

            WHEREAS, effective on or before November 30, 2000, Phibro Animal
Health Holdings, Inc., a Delaware corporation ("Animal Health Holdings"), and
Phibro Animal Health U.S., Inc., a Delaware corporation ("Animal Health-US"),
became Subsidiaries of the Company and, by virtue thereof, constitute Restricted
Subsidiaries that are not Foreign Subsidiaries; and
<PAGE>
            WHEREAS, effective on or about November 30, 2000, Animal Health
Holdings and Animal Health-US respectively executed continuing unlimited and
collateralized guaranties in favor of the agent under a certain credit facility
established in favor of the Company; and

            WHEREAS, the Company had determined that Animal Health Holdings and
Animal Health-US were required to comply with Section 4.22 of the Indenture and
execute a supplemental indenture under which they would be bound by the
Guarantee contemplated thereby, and further had determined that, by virtue
thereof, said two Restricted Subsidiaries also would have effectively satisfied
any additional guarantee requirement under Section 4.20 of the Indenture (such
that no additional action would be required in respect of Section 4.20); and

            WHEREAS, the Company, Animal Health Holdings and Animal Health-US
did intend that such supplemental indenture (including the Guarantee required in
accordance with Section 4.22 of the Indenture) would become effective as of
November 30, 2000 (the "Intended Supplemental Indenture") and further did direct
that all actions necessary and appropriate in furtherance thereof be taken; and

            WHEREAS, the Company, Animal Health Holdings and Animal Health-US
are unable to confirm whether all such actions (including the execution and
delivery of the Intended Supplemental Indenture, and the delivery of all
necessary certificates and opinions relating thereto) in fact have been
accomplished and whether the Intended Supplemental Indenture in fact has become
effective; and

            WHEREAS, on account of the foregoing, it is necessary and desirable
to cause Animal Health Holdings and Animal Health-US to confirm their prior
Guarantee under Section 4.22, to the extent the Intended Supplemental Indenture
(containing such Guarantee) in fact has become effective, or to become
Guarantors and provide for such Guarantee, to the extent not heretofore in
effect, in either case by executing and delivering this Third Supplemental
Indenture in accordance with Section 4.22; and

            WHEREAS, it also is desirable to confirm the effectiveness of the
Second Supplemental Indenture; and

            WHEREAS, pursuant to Sections 9.01(v) and 12.16 of the Indenture,
the Company and the Guarantors, when authorized by resolution of their
respective Boards of Directors, and the Trustee, together, without notice to or
the consent of any Holders of Notes, are authorized to amend or supplement the
Indenture to make any change to the Indenture that would provide any additional
benefit or rights to the Holders; and

            WHEREAS, pursuant to Sections 9.01(vii) and 12.16 of the Indenture,
the Company and the Guarantors, when authorized by resolution of their
respective Boards of Directors, and the Trustee, together, without notice to or
the consent of any Holders of Notes, are authorized to amend or supplement the
Indenture to make any change to the Indenture that does not adversely affect the
rights of any Holder under the Indenture; and
<PAGE>
            WHEREAS, this Third Supplemental Indenture amends or supplements the
Indenture (x) to add Animal Health Holdings and Animal Health-US as additional
as Guarantors under the Indenture, or to confirm their status as such, and (y)
to confirm the continuing effectiveness of the Second Supplemental Indenture,
and, accordingly, would satisfy the criteria of Section 9.01(v) or (vii), or
both, and Section 12.16 of the Indenture; and

            WHEREAS, the Company, each of the pre-existing Guarantors, Animal
Health Holdings and Animal Health-US, and the Trustee desire and have agreed to
execute and deliver this Third Supplemental Indenture as herein provided and all
conditions and requirements necessary to make this Third Supplemental Indenture
a valid, binding and legal instrument in accordance with its terms have been
performed and fulfilled and the execution and delivery hereof have been in all
respects duly authorized by all necessary parties.

            NOW, THEREFORE, for and in consideration of the premises contained
herein, it is mutually covenanted and agreed for the benefit of all Holders of
the Notes as follows:

            Section 1.

            (a) Each of Animal Health Holdings and Animal Health-US hereby
      agrees to be bound by the Indenture, as amended by this Third Supplemental
      Indenture and as hereafter amended in accordance with the terms of the
      Indenture, to the same extent as though the Indenture were incorporated
      and fully set forth in this Third Supplemental Indenture; and, by virtue
      thereof, hereby becomes a Guarantor for all purposes.

            (b) Without limiting the generality of subsection (a) above, each of
      Animal Health Holdings and Animal Health-US hereby jointly and severally
      (with each other and with each other Guarantor) absolutely,
      unconditionally and irrevocably joins in and becomes bound by the
      Guarantee of the Notes in the form set forth in the Indenture. As provided
      in Section 4.22 of the Indenture, it shall not be necessary for either or
      both of Animal Health Holdings and Animal Health-US to execute or deliver
      the Guarantee endorsed on the Notes.

            (c) Without limiting the generality of subsection (a) above, it is
      understood and agreed that the Guarantee of Animal Health Holdings and
      Animal Health-US, as undertaken in this Third Supplemental Indenture,
      shall be subject to the subordination provisions contained in Article
      Thirteen of the Indenture to the same extent as though such provisions
      were incorporated and fully set forth in this Third Supplemental
      Indenture.

            Section 2.

            (a) To the extent that the Intended Supplemental Indenture in fact
      has become effective, then the Intended Supplemental Indenture shall be
      deemed to be amended and restated and completely replaced by this Third
      Supplemental Indenture, such that the Intended Supplemental Indenture
      shall have no continuing force or effect.
<PAGE>
            (b) The effectiveness of this Third Supplemental Indenture, and of
      the Guarantee to which Animal Health Holdings and Animal Health-US are
      hereby bound by virtue hereof (whether or not previously bound by any such
      guarantee on account of the Intended Supplemental Indenture), shall be
      fully effective whether or not the Intended Supplemental Indenture ever
      became effective.

            (c) The Company and the Guarantors, including Animal Health Holdings
      and Animal Health-US, hereby ratify, confirm and approve the Second
      Supplemental Indenture in all respects.

            Section 3. The Company and the Guarantors, including Animal Health
Holdings and Animal Health-US, agree that the Trustee is permitted, and each of
them hereby authorizes the Trustee, to place a notation about this Third
Supplemental Indenture on the Notes in accordance with the provisions of Section
9.05 of the Indenture; provided that nothing herein shall limit the generality
and applicability of Section 4.22 of the Indenture.

            Section 4. The Trustee accepts this Third Supplemental Indenture and
agrees to execute the trust created by the Indenture as hereby supplemented, but
only upon the terms and conditions set forth in the Indenture, including the
terms and provisions defining and limiting the liabilities and responsibilities
of the Trustee, which terms and provisions shall in like manner define and limit
its liabilities and responsibilities in the performance of the trust created by
the Indenture as hereby supplemented.

            Section 5. This Third Supplemental Indenture is executed and shall
be construed as an indenture supplemental to the Indenture and, as provided in
the Indenture, this Third Supplemental Indenture forms a part thereof. Except as
otherwise expressly provided for in this Third Supplemental Indenture, all of
the terms and conditions of the Indenture are hereby ratified and shall remain
unchanged and continue in full force and effect.

            Section 6. The recitals contained in this Third Supplemental
Indenture shall be taken as the statements made solely by the Company and the
Guarantors, including Animal Health Holdings and Animal Health-US, and the
Trustee shall have no liability or responsibility for their correctness, and,
without limiting the generality of the foregoing, the Trustee shall not be
responsible in any manner whatsoever for or with respect to any of (i) the
validity or sufficiency of this Third Supplemental Indenture or any of the terms
or provisions hereof, (ii) the proper authorization hereof by the Company and
the Guarantors (including Animal Health Holdings and Animal Health-US) by
corporate action or otherwise, (iii) the due execution hereof by the Company and
the Guarantors (including Animal Health Holdings and Animal Health-US) or (iv)
the consequences (direct or indirect and whether deliberate or inadvertent) of
any amendment herein provided for, and the Trustee makes no representation with
respect to any such matters.

            Section 7. This Third Supplemental Indenture shall become effective
upon the execution and delivery hereof by the Company, the Guarantors (including
Animal Health Holdings and Animal Health-US) and the Trustee.
<PAGE>
            SECTION 8. THIS THIRD SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY,
AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, AS APPLIED
TO CONTRACTS MADE AND PERFORMED IN THE STATE OF NEW YORK, WITHOUT GIVING EFFECT
TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION
OF THE LAW OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

            Section 9. This Third Supplemental Indenture 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.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]
<PAGE>
                                   SIGNATURES

            IN WITNESS WHEREOF, the parties hereto have caused this Third
Supplemental Indenture to be duly executed, all as of the date first written
above.

                                     PHILIPP BROTHERS CHEMICALS, INC.,
                                     a New York corporation

                                     By: /s/ Richard G. Johnson
                                         ---------------------------------------
                                     Name:        Richard G. Johnson
                                     Title:       Chief Financial Officer

                                     C.P. CHEMICALS, INC.,
                                     a New Jersey corporation, as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer

                                     PHIBRO-TECH, INC.,
                                     a Delaware corporation, as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer

                                     MINERAL RESOURCE TECHNOLOGIES, INC.,
                                     a Delaware corporation,  as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer
<PAGE>
                                     PRINCE AGRIPRODUCTS, INC.,
                                     a Delaware corporation, as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer

                                     PHIBROCHEM, INC.,
                                     a New Jersey corporation, as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer

                                     PHIBRO CHEMICALS, INC.,
                                     a New York corporation, as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer

                                     WESTERN MAGNESIUM CORP.,
                                     a California corporation, as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer

                                     THE PRINCE MANUFACTURING COMPANY,
                                     an Illinois corporation, as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer
<PAGE>
                                     PHIBRO ANIMAL HEALTH HOLDINGS, INC.,
                                     a Delaware corporation,  as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer

                                     PHIBRO ANIMAL HEALTH U.S., INC.,
                                     a Delaware corporation, as Guarantor

                                     By: /s/ David C. Storbeck
                                         ---------------------------------------
                                     Name:        David C. Storbeck
                                     Title:       Chief Financial Officer

                                     JPMORGAN CHASE BANK, as Trustee

                                     By: /s/ Gerald L. Hill
                                         ---------------------------------------
                                     Name:    Gerald L. Hill
                                     Title:   Authorized Officer<PAGE>
                                                                  EXHIBIT 10.1.3

                                                                  EXECUTION COPY

        THIRD AMENDMENT TO AMENDED AND RESTATED REVOLVING CREDIT, CAPITAL
                     EXPENDITURE LINE AND SECURITY AGREEMENT

      THIS THIRD AMENDMENT TO AMENDED AND RESTATED REVOLVING CREDIT, CAPITAL
EXPENDITURE LINE AND SECURITY AGREEMENT (the "Agreement") is entered into on the
8th day of August, 2003 by and among PHIBRO ANIMAL HEALTH CORPORATION (formerly
known as Philipp Brothers Chemicals, Inc.), a corporation organized under the
laws of the State of New York, ("Borrower"), Phibro-Tech, Inc., a corporation
organized under the laws of the State of Delaware, C P Chemicals, Inc., a
corporation organized under the laws of the State of New Jersey, The Prince
Manufacturing Company, a corporation organized under the laws of the State of
Illinois (as an individual entity and as successor by merger to The Prince
Manufacturing Company, a corporation organized under the laws of the State of
Pennsylvania), Prince Agriproducts, Inc., a corporation organized under the laws
of the State of Delaware, Mineral Resource Technologies, Inc., a corporation
organized under the laws of the State of Delaware (successor by merger of
Mineral Resource Technologies, L.L.C. which merged into MRT Management Corp.),
Phibro-Chem, Inc., a corporation organized under the laws of the State of New
Jersey, PhibroChemicals, Inc., a corporation organized under the laws of the
State of New York, Western Magnesium Corp., a corporation organized under the
laws of the State of California, Phibro Animal Health Holdings, Inc., a
corporation organized under the laws of Delaware, and Phibro Animal Health U.S.,
Inc., a corporation organized under the laws of Delaware (each a "Guarantor" and
collectively "Guarantors"), the financial institutions which are now or which
hereafter become a party hereto (collectively, the "Lenders" and individually a
"Lender") and PNC BANK, NATIONAL ASSOCIATION, a national banking association
("PNC"), as agent for Lenders (PNC, in such capacity, the "Agent").

                                    RECITALS

      Whereas, on August 19, 1998, PNC, the Borrower and certain Guarantors
entered into a Revolving Credit, Acquisition Term Loan and Security Agreement
(as such has been amended, supplemented and/or restated until November 28, 2000,
the "Original Loan Agreement"), pursuant to which certain Lenders extended
various credit facilities in favor of the Borrower;

      Whereas, on November 29, 2000, Borrower, Guarantors and Lenders amended
and restated the Original Loan Agreement and entered into an Amended and
Restated Revolving Credit, Capital Expenditure Line and Security Agreement (as
may be amended, supplemented and/or restated, the "Loan Agreement"), pursuant to
which the Lenders extended various credit facilities in the aggregate amount of
$85,000,000 in favor of the Borrower;

      Whereas, on September 28, 2001, Borrower, Guarantors and Lenders agreed to
modify the terms of the Loan Agreement as set forth in the First Amendment to
Amended and Restated Revolving Credit, Capital Expenditure Line and Security
Agreement;

      Whereas, on October 23, 2002, Borrower, Guarantors and Lenders agreed to
modify the terms of the Loan Agreement as set forth in the Second Amendment to
Amended and Restated Revolving Credit, Capital Expenditure Line and Security
Agreement;

      Whereas, Borrower, Guarantors and Lenders have agreed to further modify
the terms of the Loan Agreement as set forth in this Agreement.

      Now, therefore, in consideration of Lender's continued extension of credit
and the agreements contained herein, the parties agree as follows:

                                    AGREEMENT

      1) ACKNOWLEDGMENT OF BALANCE. Borrower acknowledges that the most recent
statement of account sent to Borrower with respect to the Obligations is
correct.
<PAGE>
                                                                  EXECUTION COPY

      2) MODIFICATIONS. The Loan Agreement and the Other Documents be and hereby
are modified as follows:

      (A) The name "Philipp Brothers Chemicals, Inc." throughout the Loan
      Agreement and the Other Documents is hereby deleted and replaced with the
      name "Phibro Animal Health Corporation (formerly known as Philipp Brothers
      Chemicals, Inc.)".

3) ACKNOWLEDGMENTS. Borrower acknowledges and represents that:

      (A) the Loan Agreement and Other Documents, as amended hereby, are in full
force and effect without any defense, claim, counterclaim, right or claim of
set-off;

      (B) to the best of its knowledge, no default by the Agent or Lenders in
the performance of their duties under the Loan Agreement or the Other Documents
has occurred;

      (C) all representations and warranties of the Borrower contained herein
and in the Other Documents are true and correct in all material respects as of
this date, except for any representation or warranty that specifically refers to
an earlier date and except to the extent that the Agent and the Lenders have
been notified by the Borrower that any representation or warranty is not correct
and the Required Lenders have explicitly waived in writing compliance with such
representation or warranty (which waiver is hereby granted) and except for
changes not prohibited by the terms of the Loan Agreement;

      (D) Borrower has taken all necessary corporate or company action to
authorize the execution and delivery of this Agreement; and

      (E) this Agreement is a modification of an existing obligation and is not
a novation.

4)    PRECONDITIONS. The Borrower shall deliver to the Agent the following: (a)
      an executed Third Amendment to Amended and Restated Revolving Credit,
      Capital Expenditure Line and Security Agreement, (b) evidence that the
      Borrower has filed all necessary documentation with regard to the changing
      of its name from Philipp Brothers Chemicals, Inc. to Phibro Animal Health
      Corporation in its State of incorporation and in all jurisdiction which it
      is qualified to do business and (c) an executed resolution of the Borrower
      authorizing the transaction described herein. It is understood and agreed
      that Borrower shall pay all fees and costs incurred by Lenders in entering
      into this Agreement and the other documents executed in connection
      herewith, including but not limited to all reasonable attorney fees and
      expenses of Lenders' counsel.

5)    MISCELLANEOUS. This Agreement shall be construed in accordance with and
      governed by the laws of the State of New Jersey, without reference to that
      state's conflicts of law principles. This Agreement and the Other
      Documents constitute the sole agreement of the parties with respect to the
      subject matter hereof and thereof and supersede all oral negotiations and
      prior writings with respect to the subject matter hereof and thereof. No
      amendment of this Agreement, and no waiver of any one or more of the
      provisions hereof shall be effective unless set forth in writing and
      signed by the parties hereto. The illegality, unenforceability or
      inconsistency of any provision of this Agreement shall not in any way
      affect or impair the legality, enforceability or consistency of the
      remaining provisions of this Agreement or the Other Documents. This
      Agreement and the Other Documents are intended to be consistent. However,
      in the event of any inconsistencies among this Agreement and either the
      Loan Agreement or any of the Other Documents, the terms of this Agreement,
      then the Loan Agreement, shall control. This Agreement may be executed in
      any number of counterparts and by the different parties on separate
      counterparts. Each such counterpart shall be deemed an original, but all
      such counterparts shall together constitute one and the same agreement.

                                       2
<PAGE>
                                                                  EXECUTION COPY

6)    DEFINITIONS. The terms used herein and not otherwise defined or modified
      herein shall have the meanings ascribed to them in the Loan Agreement. The
      terms used herein and not otherwise defined or modified herein or defined
      in the Loan Agreement shall have the meanings ascribed to them by the
      Uniform Commercial Code as enacted in New Jersey.

IN WITNESS WHEREOF, the undersigned have signed and sealed this Agreement the
day and year first above written.

<TABLE>
<S>                                             <C>
BORROWER:

ATTEST:                                         PHIBRO ANIMAL HEALTH CORPORATION
                                                (formerly known as Philipp Brothers Chemicals, Inc.)

BY:  /s/ David C. Storbeck                      By:  /s/ Richard G. Johnson
   ---------------------------------------           --------------------------------------------------
    David C. Storbeck, Assistant Secretary           Richard G.  Johnson, Vice President
                                                     One Parker Plaza
                                                     Fort Lee, N.J. 07024

GUARANTORS:

ATTEST:                                         PHIBRO-TECH, INC.

BY: /s/ David C. Storbeck                       By:  /s/ W. Dwight Glover
    --------------------------------------           --------------------------------------------------
       David  C. Storbeck, Vice President            W. Dwight Glover, President
                                                     One Parker Plaza
                                                     Fort Lee, N.J. 07024

ATTEST:                                         C P CHEMICALS, INC.

BY: /s/ David C. Storbeck                       By:  /s/ Jack C. Bendheim
    --------------------------------------           --------------------------------------------------
      David  C. Storbeck, Vice President             Jack C. Bendheim, President
                                                     One Parker Plaza
                                                     Fort Lee, N.J. 07024

ATTEST:                                         THE PRINCE MANUFACTURING COMPANY (IL)

                                                (as an individual entity and as successor by merger to
                                                The Prince Manufacturing Company, a corporation
                                                organized under the laws of the State of Pennsylvania,)

BY: /s/ David C. Storbeck                       By: /s/ Marvin Sussman
    --------------------------------------          --------------------------------------------------------------
      David C. Storbeck, Vice President              Marvin Sussman,  President
                                                     One Prince Plaza
                                                     P.O. Box 1009
                                                     Quincy, Il. 62306
</TABLE>

                                       3
<PAGE>
                                                                  EXECUTION COPY

<TABLE>
<S>                                                  <C>
ATTEST:                                              PRINCE AGRIPRODUCTS, INC.

BY: /s/ David C. Storbeck                             By: /s/ Marvin Sussman
    --------------------------------------------          --------------------------------------------------------
      David C. Storbeck, Vice President                    Marvin Sussman, President
                                                           One Prince Plaza
                                                           P.O. Box 1009
                                                           Quincy, Il. 62306

ATTEST:                                              Mineral Resource Technologies, Inc.
                                                     (successor by merger of Mineral Resource Technologies, L.L.C.
                                                      which merged into MRT Management Corp.)

BY: /s/ Hugh Shannonhouse                            By: /s/ David C. Storbeck
    --------------------------------                 -------------------------------------------------------------
       Hugh Shannonhouse, President                      David C. Storbeck, Vice President
                                                         2700 Research Forest Drive
                                                         Suite 150
                                                         The Woodlands, TX 77381

ATTEST:                                              PHIBRO-CHEM, INC.

BY: /s/ David C. Storbeck                            By: /s/ Jack C. Bendheim
    --------------------------------------------         ---------------------------------------------------------
      Davic C. Storbeck, Vice President                  Jack C. Bendheim, President
                                                         One Parker Plaza
                                                         Fort Lee, N.J. 07024

ATTEST:                                              PHIBROCHEMICALS, INC.

BY: /s/ David C. Storbeck                            By: /s/ Jack C. Bendheim
   --------------------------------------------          ---------------------------------------------------------
      David C. Storbeck, Vice President                  Jack C. Bendheim, President
                                                         One Parker Plaza
                                                         Fort Lee, N.J. 07024

ATTEST:                                              WESTERN MAGNESIUM CORP.

BY: /s/ David C. Storbeck                            By: Jack C. Bendheim
    --------------------------------------------         --------------------------------------------------------
      David C. Storbeck, Vice President                  Jack, C. Bendheim, President
                                                         One Parker Plaza
                                                         Fort Lee, N.J. 07024
</TABLE>

                                       4
<PAGE>
                                                                  EXECUTION COPY

<TABLE>
<S>                                                      <C>
ATTEST:                                                  PHIBRO ANIMAL HEALTH HOLDINGS, INC.

BY: /s/ David C. Storbeck                                By:/s/ Marvin Sussman
    --------------------------------------------            --------------------------------------------------
      David C. Storbeck,  Vice President                     Marvin Sussman,  President
                                                             One Parker Plaza
                                                             Fort Lee, N.J. 07024

ATTEST:                                                  PHIBRO ANIMAL HEALTH  U.S., INC.

BY: /s/ David C. Storbeck                                By:/s/ Marvin Sussman
    --------------------------------------------            --------------------------------------------------
      David C. Storbeck, Vice President                     Marvin Sussman, President
                                                            One Parker Plaza
                                                            Fort Lee, N.J. 07024

LENDERS:

ATTEST:                                                  PNC BANK, NATIONAL ASSOCIATION, as Lender and as
                                                         Agent

                                                         By:__________________________________________________
------------------------------------------------
                                                            Name:  Michelle Stanley-Nurse
                                                            Title:  Vice President
                                                            Address:  70 East 55th Street, 14th Floor
                                                                      New York, New York  10022
                                                         Commitment Percentage:  41.1764705882%

                                                         BANK OF AMERICA, N. A., as Lender

                                                         By: /s/ Edmundo E. Kahn
                                                             -------------------------------------------------
                                                             Name: Edmundo E. Kahn
                                                             Title: Vice President
                                                             Address:   335 Madison Avenue
                                                                        6th Floor
                                                                        New York, New York 10017
                                                         Commitment Percentage:  29.4117647059%

                                                         GENERAL ELECTRIC CAPITAL CORPORATION, as
                                                         Lender

                                                         By: /s/ Susan Timmerman
                                                             --------------------------------------------------
                                                             Name:    Susan Timmerman
                                                             Title:   Sr. Risk Manager
                                                             Address: 401 Merritt 7
                                                                      Norwalk, CT 06854

                                                         Commitment Percentage:  29.4117647059%

</TABLE>

                                       5

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