Nov. 24, 2009 (PR Newswire) --

ST. LOUIS, Nov. 24 /PRNewswire-FirstCall/ -- Sigma-Aldrich Corporation (Nasdaq: SIAL) will be presenting at the NASDAQ OMX conference on Tuesday, December 1st at 1:45 PM GMT in London, 7:45 AM US/CST. Interested parties may listen via live audio broadcast over the Internet available at http://investor.sigmaaldrich.com/. Users can click the "Webcast" icon to access this file.

About Sigma-Aldrich: Sigma-Aldrich is a leading Life Science and High Technology company. 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 38 countries and has 7,800 employees providing excellent service worldwide. Sigma-Aldrich is committed to Accelerating Customer Success through Innovation and Leadership in Life Science, High Technology and Service. For more information about Sigma-Aldrich, please visit its award-winning Web site at http://www.sigma-aldrich.com.

SOURCE Sigma-Aldrich Corporation