SIAL (MM)

ST. LOUIS, Jan. 27, 2012 /PRNewswire/ -- Sigma-Aldrich Corporation (NASDAQ: SIAL) will be presenting at the following investor conferences in February:

• Leerink Swann 2012 Global Healthcare Conference on Thursday, February 16, 2012, at the Waldorf Astoria Hotel, New York, NY, presenting at 9:00 A.M. (EST).
• Citi 2012 Global Healthcare Conference on Monday, February 27, 2012, at the Waldorf Astoria Hotel, New York, NY, presenting at 2:00 P.M. (EST)

(Logo: http://photos.prnewswire.com/prnh/20050215/CGSIGMAALLOGO)

Interested parties may listen via live audio broadcast of these presentations 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 biochemical and organic chemical products and kits are used in scientific and genomic research, biotechnology, pharmaceutical development, the diagnosis of disease and as key components in pharmaceutical 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 8,300 employees providing excellent service worldwide.  The Company 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 www.sigma-aldrich.com

SOURCE Sigma-Aldrich Corporation