Effective May 1, 2011, or as soon thereafter as the applicable contract allows, The Dow Chemical Company (“Dow”) will increase its price for VORANATE TDI by USD $0.10/pound in the United States. This price increase is in additionto the previously announced $0.05/pound increase effective April 1, 2011.

All other contract terms and conditions remain in full force and effect and orders must comply with established monthly sales levels and contract commitments. Your Dow sales representative will be contacting you in order to answer anyquestions you might have and to review your sales plan volumes.

Dow appreciates your business, and we look forward to our continued relationship.