SIAL (MM)

ST. LOUIS, Aug. 10 /PRNewswire-FirstCall/ -- Sigma-Aldrich® (Nasdaq: SIAL) -- At the Board of Directors meeting held today, the Directors declared a quarterly cash dividend of $.16 per share.  The dividend is payable on September 15, 2010 to shareholders of record on September 1, 2010.

About Sigma-Aldrich: Sigma-Aldrich is a leading Life Science and High Technology company committed to Enabling Science to Improve the Quality of Life. Its chemical and biochemical products and kits are used in scientific research, including genomic and proteomic research, biotechnology, pharmaceutical development and as key components in pharmaceutical, diagnostic and other high technology manufacturing. The Company has customers in life science companies, university and government institutions, hospitals, and in industry. Over one million scientists and technologists use its products. Sigma-Aldrich operates in 40 countries and has 7,600 employees providing excellent service worldwide. For more information about Sigma-Aldrich, please visit its award-winning Web site at http://www.sigma-aldrich.com.

SOURCE Sigma-Aldrich Corporation