Exhibit10.1 The DowChemical Company 2030 DowCenter Midland,Michigan 48674

Now therefore, in consideration of the foregoing and intending to be legally bound hereby, subject to the execution of the Closing Order by the Delaware Court on or before March 9, 2009, the signatories hereto agree as follows:

 

1.           Each of Dow and Merger Sub irrevocably agrees that it shall consummate the Merger on or before 3:00 p.m., New York City time, April 1, 2009, conditioned only upon (a) the Haas Trusts and Paulson complying with their respective obligations under the Investment Agreement and (b) Rohm and Haas complying in all material respects with its covenants under the Merger Agreement on or after March 9, 2009 through April 1, 2009 (to the extent such covenants by their terms contemplate performance during such period).

 

2.           Each of Dow and Merger Sub shall comply with the Closing Order.

 

3.           This letter agreement shall not waive or modify any right or remedy of Rohm and Haas under the Merger Agreement, which shall remain in full force and effect as supplemented by the commitment of Dow and Merger Sub hereunder.

 

4.           Neither this letter nor any of the rights, interests or obligations hereunder shall be assigned by either party hereto (whether by operation of law or otherwise) without the prior written consent of the other party.   This letter may be executed in two or more consecutive counterparts (including by facsimile), each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument.

 

5.           This letter shall be governed by and construed in accordance with the laws of the State of Delaware applicable to agreements made and to be performed entirely within the State of Delaware.   Each of the signatories agree that any dispute arising out of this letter agreement shall be litigated exclusively in the Delaware Court.  The signatories further agree and acknowledge that any breach of this agreement will result in irreparable injury to the non-breaching signatories and that the signatories would not have any adequate remedy at law.  It is accordingly agreed that the signatories shall be entitled to an injunction or injunctions to prevent breaches or threatened breaches of this letter agreement and to enforce specifically the terms and provisions of this Agreement.  The foregoing is in addition to any other remedy to which any signatory is entitled at law, in equity or otherwise.

 

6.           Each signatory to this letter agreement hereby represents and warrants that: (a) it has all requisite corporate or other power and authority to enter into this letter agreement and to consummate the transactions contemplated hereby; (b) the execution and delivery of this letter agreement and the consummation of the transactions contemplated hereby, has been duly and validly authorized by it and no other corporate, partnership, trust or similar  proceedings on its part are necessary to authorize the consummation of the transactions contemplated hereby; and (c) this letter agreement has been duly and validly executed and delivered by it and this letter agreement constitutes the valid and binding agreements of it, enforceable against it in accordance with its terms.

 

7.           Effective as of the Effective Time (as defined in the Merger Agreement), each of Rohm and Haas and Dow, on behalf of itself and its affiliates, subsidiaries, divisions, partners, officers, directors, employees, agents, representatives, trustees, attorneys, assigns,

successors, and predecessors, and any and all persons acting on behalf of any of the foregoing, releases and forever discharges Dow and Merger Sub (in the case of Rohm and Haas) or Rohm and Haas (in the case of Dow) and their respective stockholders, members, officers, directors, employees, attorneys, advisors, agents, parents, subsidiaries, affiliates, heirs, executors, administrators, predecessors, successors and assigns, from all actions, causes of action, suits, debts, dues, sums of money, accounts, reckonings, bills, specialties, covenants, contracts, controversies, agreements, promises, damages, judgments, executions, claims, and demands whatsoever, past, present, direct, indirect, or derivative, in law or equity that arise out of rights and obligations under the Merger Agreement or this letter, any breach, non-performance, or failure to act under the Merger Agreement or this letter, except for those arising out of Section 5.9 of the Merger Agreement and except for provisions of the Merger Agreement and other obligations in each case that by their terms contemplate performance at or after the Effective Time (hereinafter, the “Released Claims”); it is the intention of Rohm and Haas and Dow to extinguish all Released Claims, whether known or unknown, suspected or unsuspected, which do or do not exist, or heretofore existed, without regard to the subsequent discovery or existence of additional facts different from what it now believes to be true with respect to the subject matter of the Released Claims.  After the Effective Time, the provisions of Section 3 hereof shall not be interpreted to affect the releases contemplated by this Section 7.