|  EXHIBIT 10.7.3                                   |
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|  Union Carbide Corporation and Subsidiaries  |

|   | 1. | “TDCC Reference Rate” means the interest rate established for intercompany financing transactions by the Corporate Treasury Department of The Dow Chemical Company (Borrower).  This rate is set to LIBOR plus 105 basis points as of the effective date of this Amendment, any future changes to this rate will be effective if agreed between the Lender and the Borrower in writing.” |
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|   | 2. | No Other Amendment or Waiver.  Except as expressly amended by this Amendment, the Loan Agreement remains in full force and effect in accordance with its terms. |
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|   | 3. | Execution in Counterparts.  This Amendment may be executed in any number of counterparts, each of which when so executed will be deemed to be an original and all of which taken together will constitute one and the same agreement.  Signature pages may be detached from multiple separate counterparts and attached to a single counterpart so that all signature pages are attached to the same document. |
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|   | 4. | Governing Law.  This Amendment and the rights and obligations of the parties to this Amendment will be governed by and construed and interpreted in accordance with the laws of the State of New York. |
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|   | THE DOW CHEMICAL COMPANY  By: /s/ ANDREAS UNTERSTE           Name:    Andreas UntersteTitle:      Director of Financial Operations, Compliance               and Technology | UNION CARBIDE CORPORATION  By: /s/ EUDIO GIL                Name:   Eudio GilTitle:     Chief Financial Officer, Vice President              and Treasurer |
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