Sigma-Aldrich Corporation To Present At The Bank of America Securities Healthcare Conference On Wednesday, May 17, 2006

ST. LOUIS, May 10 /PRNewswire-FirstCall/ -- Sigma-Aldrich Corporation will be presenting at the Banc of America Securities Healthcare Conference on Wednesday, May 17th at 10:40 AM PT in Las Vegas.

Interested parties may listen via live audio broadcast over the Internet available at http://ir.sigmaaldrich.com . Users can click the “Webcast” icon to access this file. For the webcast on http://ir.sigmaaldrich.com users will need to have Media Player software, which can be downloaded at http://www.microsoft.com/windows/windowsmedia/9series/player.aspx .

About Sigma-Aldrich: Sigma-Aldrich is a leading Life Science and High Technology company. Our 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. We have customers in life science companies, university and government institutions, hospitals and in industry. Over one million scientists and technologists use our products. Sigma-Aldrich operates in 35 countries and has 7,000 employees providing excellent service worldwide. We are committed to accelerating our Customers’ success through leadership in Life Science, High Technology and Service. For more information about Sigma-Aldrich, please visit our award-winning web site at http://www.sigma-aldrich.com .

Photo: http://www.newscom.com/cgi-bin/prnh/20050215/CGSIGMAALLOGOAP Archive: http://photoarchive.ap.orgPRN Photo Desk, photodesk@prnewswire.comSigma-Aldrich

CONTACT: Debbie Bockius of Sigma-Aldrich Corporation, +1-314-286-8015,dbockius@sial.com

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