Exhibit 2.2

                               AMENDMENT NO. 1 TO
                          AGREEMENT AND PLAN OF MERGER

                AMENDMENT NO. 1 (the "Amendment"), dated as of November 28,
                                      ---------
2001, by and among IMC Global Inc., a Delaware corporation ("Seller"), and Salt
Holdings Corporation, a Delaware corporation and an indirect, wholly owned
subsidiary of Seller (the "Company"), on the one hand, and on the other hand,
YBR Holdings LLC, a Delaware limited liability company ("Purchaser"), and YBR
Acquisition Corp., a Delaware corporation, a wholly owned subsidiary of
Purchaser ("Merger Sub") to the Agreement and Plan of Merger (the "Agreement"),
                                                                   ---------
dated as of October 13, 2001, by and among Seller, the Company, Purchaser and
Merger Sub. Capitalized terms used herein and not otherwise defined shall have
the meanings ascribed to them in the Agreement.

                WHEREAS, the parties hereto desire to enter into this Amendment
so as to make certain modifications to the Agreement;

                NOW, THEREFORE, for good and valuable consideration and in
consideration of the respective representations, warranties, covenants and
agreements set forth in the Agreement, the parties hereto, intending to be
legally bound, agree as follows:

                                    ARTICLE I

                                   AMENDMENTS

                Section 1.1 Company Common Stock Definition
                            -------------------------------

                The language in Section 1.1 of the Agreement is hereby amended
by deleting the phrase "par value $.01 per share" in the definition of "Company
Common Stock" and replacing it with the phrase "par value $1.00 per share".

                Section 1.2 Amendments Relating Canadian Holdback Amount
                            --------------------------------------------

                (a) The inclusion of an amount in the "Net Canadian Holdback
Amount" (as defined in, and pursuant to, the Agreement) that represents the
portion of the "Canadian Target Tax Amount" (as defined in the Agreement)
described in clause (i) of the definition of "Canadian Target Tax Amount" in
lieu of payment or withholding of such amount pursuant to Section 6.12 of the
Agreement or payment or withholding of taxes, as represented in Section 3.17 of
the Agreement, to which such amount relates shall not constitute a failure to
satisfy a condition, provided in Section 7.2(a) or (b) of the Agreement, to the
obligation of the Purchaser to effect the Closing (as defined in the Agreement);





                (b) The language in Sections 2.10 and 2.12 of the Agreement is
     hereby amended as follows:

                    (1) in the first sentence of Section 2.10(c)(i) delete the
                        word "and" that appears between the words "practice" and
                        "(viii)" and replace it with a comma;

                    (2) at the end of the first sentence of Section 2.10(c)(i)
                        (but before the period) add the words "and (ix) a
                        calculation of the Net Canadian Holdback Amount";

                    (3) in the last sentence of Section 2.10(c)(i):

                        (A) delete the first occurrence of the phrase "Actual
          Sales Bonuses and the Actual U.K. Funding Amount," and replace it with
          the phrase "Actual Sales Bonuses, the Actual U.K. Funding Amount and
          the Net Canadian Holdback Amount,"; and

                        (B) delete the phrase "Actual U.K. Funding Amount, and
          the Net Interim Period Adjustment Amount (and the elements of such
          calculation)" and replace it with "Actual U.K. Funding Amount, the Net
          Interim Period Adjustment Amount (and the elements of such
          calculation) and the Net Canadian Holdback Amount";

                    (4) in the first sentence of Section 2.10(c)(ii) delete the
                        phrase "or the Net Interim Period Adjustment Amount or"
                        and replace it with "the Net Interim Period Adjustment
                        Amount or the Net Canadian Holdback Amount or";

                    (5) in the second sentence of Section 2.10(c)(ii) delete
                        the phrase "and the Net Interim Period Adjustment Amount
                        (and each element of such calculation)," and replace it
                        with "the Net Interim Period Adjustment Amount (and each
                        element of such calculation) and the Net Canadian
                        Holdback Amount,";

                    (6) in the third, fifth, and eighth sentences of Section
                        2.10(c)(ii) delete the phrase "or the Net Interim Period
                        Adjustment Amount (or any


                                       2



                    element thereof)" and replace it with ", the Net Interim
                    Period Adjustment Amount (or any element thereof) or the Net
                    Canadian Holdback Amount";

               (7)  in the eighth sentence of Section 2.10(c)(ii) add the words
                    "or the Net Canadian Holdback Amount" between the second
                    occurrence of the phrase "(and each element thereof)" and
                    the word ", respectively,";

               (8)  add the following sentence at the end of Section
                    2.10(c)(iii):

               If the amount of the Net Canadian Holdback Amount used to
               determine the Estimated Closing Date Contribution Adjustment
               pursuant to Section 2.10(a) exceeds the amount of the Net
               Canadian Holdback Amount determined pursuant to this Section
               2.10(c), the Company shall pay to Seller the amount of such
               excess in the manner provided in Section 2.10(c)(iv). If the
               amount of the Net Canadian Holdback Amount determined pursuant to
               this Section 2.10(c) exceeds the amount of the Net Canadian
               Holdback Amount used to determine the Estimated Closing Date
               Contribution Adjustment pursuant to Section 2.10(a), Seller shall
               pay to the Company the amount of such excess in the manner
               provided in Section 2.10(c)(iv).

               and

               (9)  in Section 2.12, delete the phrase "At the Closing" and
                    replace it with the phrase "From and after the Closing" ,
                    and add the words "(as may be adjusted pursuant to Section
                    2.10(c)" immediately after the each occurrence of the phrase
                    "Net Canadian Holdback Amount".

          Section 1.3   Intercompany Accounts
                        ---------------------

          Section 5.7 of the Agreement is hereby amended to delete the phrase
"Prior to the Closing" in the first line of the first sentence, and replacing it
with the phrase "Effective immediately prior to the closing". Notwithstanding
the foregoing,


                                       3



Section 6.12 of the Agreement shall govern the repayment of any receivables owed
by IMC Salt Inc. to Sifto Canada Inc.

          Section 1.4   No Impact on Indemnity, etc.
                        ---------------------------

          The provisions of this Amendment shall have no impact on the Seller's
obligation to indemnify the Purchaser pursuant to the provisions of the
Agreement (including Article VI thereof) with respect to Taxes (as defined
therein).

          Section 1.5   Actions Relating to Lis Pendens.
                        -------------------------------

          Article V is hereby amended to insert the following Section 5.22:

               Section 5.22 Certain Lis Pendens  In addition to any other
                            -------------------
     obligation set forth in this Agreement, Seller covenants and agrees to
     promptly pursue legal proceedings or other actions to cause any caution,
     lis pendens, affidavit, caveat or similar notice filing, which are now or
     in the future filed by or on behalf of Madison Dearborn Partners LLC
     against any of the Properties, removed as promptly as practicable from the
     applicable record. So long as any such caution, lis pendens, affidavit,
     caveat or similar notice filing by or on behalf of Madison Dearborn
     Partners shall encumber any Property or Properties, Seller further agrees
     that at the request of the purchaser's title company providing insurance to
     any successor in interest to any such Property or Properties to which any
     such notice filing relates, or any lender secured by any such Property or
     Properties, from time to time, to provide reasonable assistance to any such
     party in obtaining a title endorsement similar in scope and nature relating
     to the notice filings as the Purchaser obtained at the Closing, which will
     include issuing, affirming, reaffirming or confirming to the purchaser's
     title company its obligations under the indemnity given to the title
     company at the Closing and relating to such notice filings referred to
     above in connection with the Closing as if such indemnity were given to
     purchaser's title company.

          Section 1.6   Letters of Credit
                        -----------------

          Article V is hereby amended to insert the following Section 5.23:

               Section 5.23 Certain Letters of Credit. Purchaser agrees to cause
                            -------------------------
     the Surviving Corporation to use is reasonable best efforts to replace the
     Letters of Credit of Seller for the benefit of IMC Salt, Inc., Sifto
     Canada, Inc. and IMC Kalium Ogden Corp. set forth in item 3 of Section
     3.16(a)(v) of the Seller Disclosure Schedule as soon as reasonably
     practicable following


                                        4



          the Closing. Purchaser hereby agrees to reimburse Seller for any
          amounts extended pursuant to such existing Letters of Credit.

               Section 1.7    Acknowledgement of Collateral
                              -----------------------------

               Article X is hereby amended to insert the following Section
          10.12:

                     Section 10.12 Acknowledgment. Seller hereby acknowledges
                                   --------------
          that the Purchaser will assign the Supply Agreements as collateral for
          the benefit of the Lenders under the Credit Agreement dated as of
          November 28, 2001 among Salt Holdings Corporation; Compass Minerals
          Group, Inc., as US Borrower; Sifto Canada, Inc., as Canadian Borrower;
          Salt Union Limited, as UK Borrower; The Lenders Party Hereto; JPMorgan
          Chase Bank, as Administrative Agent; J.P. Morgan Bank Canada, as
          Canadian Agent; Chase Manhattan International Limited, as UK Agent;
          J.P. Morgan Securities Inc., as Joint Advisor, Co-Lead Arranger and
          Joint Bookrunner; Deutsche Banc Alex. Brown Inc., as Syndication
          Agent, Joint Advisor, Co-Lead Arranger and Joint Bookrunner; Credit
          Suisse First Boston, as Co-Documentation Agent; and Credit Lyonnais,
          as Co-Documentation Agent.

               Section 1.8    Real Estate Schedule Amendments
                              -------------------------------

               (a)   Section 1.1(e)(i) - Permitted Encumbrances (US Properties)
(Canadian Properties) of the Seller Disclosure Letter is hereby amended and
restated in its entirety to read as set forth in Exhibit A attached hereto.

               (b)   Section 1.1(e)(ii) - Surveys of the Seller Disclosure
Letter is hereby amended and restated in its entirety to read as set forth in
Exhibit B attached hereto.

               (c)   Section 1.1(e)(iii) - Permitted Encumbrances (U.K.
Properties) of the Seller Disclosure Letter is hereby amended and restated in
its entirety to read as set forth in Exhibit C attached hereto.

               (d)   Exhibit 3.10 to Section 3.10 of the Seller Disclosure
Letter is hereby amended and restated in its entirety to read as set forth in
Exhibit D attached hereto.

               (e)   Section 3.10(a) of the Seller Disclosure Letter is hereby
amended and restated in its entirety to read as set forth in Exhibit E attached
hereto.

               Section 1.9    Intellectual Property Schedule Amendments
                              -----------------------------------------


                                        5



               (a)  Section 3.12 of the Seller Disclosure Letter to the
Agreement is hereby amended as follows:

                    (1)  on the last row of the table in Section 3.12(a)(i), in
                         the column entitled "Owner of Record", delete the name
                         "Carey Sale Company, Inc." and replace it with the name
                         "Carey Salt Company, Inc.";

                    (2)  in the table in Section 3.12(a)(ii), in the row for
                         owner of record IMC Salt Inc., trademark EV'R-FLO,
                         replace the word "Registered" in the "Status" column
                         with the words "Registration was not renewed.";

                    (3)  in the table in Section 3.12(a)(iv), in the row listing
                         the System/Software Services Agreement between Salt
                         Union Limited and Comice Computing Associated Limited,
                         delete the language included in the "Terms" column;

                    (4)  in the table in Section 3.12(a)(iv), in the row listing
                         the License Agreement between Vigoro Canada Acquisition
                         Corp. and IMC Kalium Canada Ltd, add the following
                         words after the existing language in the "Goods"
                         column: "NOTE: On September 21, 2001, Licensor sent a
                                  ----
                         Notice of Termination to Licensee terminating this
                         Agreement.";

                    (5)  delete Section 3.12(b)(i) in its entirety, and replace
                         with the following: "Ownership Exceptions. Certain of
                                              --------------------
                         the patents, trademarks and copyrights listed on
                         Section 3.12(a)(i), (ii) and (iii) are not listed in
                         the applicable intellectual property registry as being
                         held in the name of any Acquired Company, as indicated
                         by the designation [*]. As of the Closing, any of such
                         patents, trademarks and copyrights that are not listed
                         as "Abandoned" have been assigned to an Acquired
                         Company and such assignments have been filed or are in
                         the process of being filed with the applicable


                                        6



                    intellectual property registry, or a name change has been
                    filed or is in the process of being filed with the
                    applicable intellectual property registry to reflect the
                    proper name of an Acquired Company, as appropriate";

           (b) delete Section 3.12(b)(ii) in its entirety, and replace with the
following: "In a Settlement Agreement dated October 19, 2001, by and between
Cargill, Incorporated, IMC Salt, Inc. and IMC Kalium Ltd (n/k/a IMC USA, Inc.),
the parties to the Settlement Agreement settled the dispute arising out of IMC's
applications for the trademarks WHITE DIAMOND and DIAMOND HARD DIAMOND PURE. A
copy of the Settlement Agreement has been provided to Purchaser".

           Section 1.10    Miscellaneous Schedule Amendments
                           ---------------------------------

           (a) Section 3.4 of the Seller Disclosure Letter to the Agreement is
 hereby amended as follows:


               (1)  In Section (b)(I)(13) (IMC Kalium Ogden Corp.), delete the
                    word "Alberta" in the "Qualification" row;

               (2)  In Section (b)(I)(3) (IMC Global (UK) Limited), delete the
                    phrases "Cert #2 55,556 shares - Issued 5/31/96" and "Cert
                    #3 157,000,000 shares - Issued 5/31/96" in the "Owner & %
                    Interest" row and replace them with the phrase "Cert #5
                    157,055,556 shares - Issued 23/11/01";

               (3)  In Section (b)(I)(4) (Salt Union Limited), delete the phrase
                    "Cert #15 - Issued 5/21/96" in the "Owner & % Interest" row
                    and replace it with the phrase "Cert #18 - Issued 23/11/01";
                    and

               (4)  In Section (b)(I)(4) (Salt Union Limited), delete the phrase
                    "Cert. # __ - Issued __" in the "Owner & % Interest" row for
                    owner Rose Marie Williams, and replace it with the phrase
                    with "Cert. # 16 - Issued 14/4/2001".

                                       7



          (b)  Section 3.16 of the Seller Disclosure Letter to the  Agreement is
hereby amended as follows:

               (1)  in Section 3.16(viii), delete the third from last bullet
                    point in its entirety which stated: "Counter indemnity made
                    by Salt Union Limited (the "Company") in favour of The
                    Governor and Company of the Bank of Scotland (the "Bank") in
                    respect of the performance bond issued by the Bank on behalf
                    of the Company to guarantee a sum in the amount
                    of(pound)500,000 in favour of Norfolk County Council in
                    connection with the Company's obligations under a PFI
                    Contract for the design, building, financing, and operation
                    of a serviced salt supply system made between (1) Norfolk
                    County Council and (2) the Company dated 30 March 2000";

               (2)  in Section 3.16(xi) delete the language in footnote 3 which
                    stated "Agreement to be novated to Ineos Chlor" and replace
                    it with "Agreement to be assigned to Ineos Chlor" for the
                    Salt Union Limited Sales Contract for customer "ICI
                    Chemicals & Polymers/Chlor-Chemicals"; and

               (3)  in Section 3.16(xi) delete the following contract, which was
                    the sixth entry of the Salt Union Limited Haulage Contracts:

- --------------------------------------------------------------------------------
6.   Direct Salt Supplies          White salt        0.28 pa        Expires
                                                                    2001
- --------------------------------------------------------------------------------



                                   ARTICLE II

                                  MISCELLANEOUS

          Section 2.1 Nature of Amendment. Except as expressly provided herein,
                      -------------------
the Agreement shall continue to be, and shall remain, in full force

                                        8



and effect. Except as expressly provided herein, this Amendment shall not be
deemed to be a waiver of, or consent to, or a modification or amendment of, any
other term of condition of the Agreement. Any reference to the Agreement in the
Agreement or any other document (except as specifically indicated to the
contrary) shall be deemed to be a reference to the Agreement as amended hereby.

             Section 2.2 Governing Law. This Amendment shall be governed by, and
                         -------------
construed in accordance with, the laws of the State of Delaware.

             Section 2.3 Counterparts. This Amendment may be executed and
                         ------------
delivered (including by facsimile transmission) in one or more counterparts, and
by the different parties hereto in separate counterparts, each of which when
executed and delivered shall be deemed to be an original but all of which taken
together shall constitute one and the same agreement.

                                        9



             IN WITNESS WHEREOF, the parties have executed or caused this
Amendment to be executed as of the date first written above.


                              IMC GLOBAL INC.





                              By:_________________________________
                                 Name:
                                 Title:


                              SALT HOLDINGS CORPORATION



                              By:_________________________________
                                 Name:
                                 Title:


                              YBR HOLDINGS LLC





                              By:_________________________________
                                 Name:
                                 Title:


                              YBR ACQUISITION CORP.





                              By:_________________________________
                                 Name:
                                 Title:

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