MIDLAND, Mich.--(BUSINESS WIRE)--The Dow Chemical Company (NYSE: DOW) announced today that it has signed a definitive agreement under which AgroFresh, its post-harvest specialty chemical business, will be acquired by Boulevard Acquisition Corp. (NASDAQ: BLVD, BLVDU, BLVDW), a public investment vehicle, formed by Avenue Capital Group, for $860 million, or 9.2x EBITDA multiple based on 2014 earnings. The transaction has been unanimously approved by the boards of directors of both companies, and i