ST. LOUIS, Nov. 25 Sigma-Aldrich Corporation(Nasdaq: SIAL) will be presenting at the 19th Annual Citi Chemicals Conferenceon Tuesday, December 2nd at 3:15 PM ET in New York. Interested parties maylisten via live audio broadcast over the Internet available athttp://ir.sigmaaldrich.com. Users can click the "Webcast" icon to access thisfile. For the webcast on http://ir.sigmaaldrich.com users will need to haveMedia Player software, which can be downloaded athttp://www.microsoft.com/windows/windowsmedia/9series/player.aspx.
About Sigma-Aldrich: Sigma-Aldrich is a leading Life Science and HighTechnology company. Our biochemical and organic chemical products and kits areused in scientific and genomic research, biotechnology, pharmaceuticaldevelopment, the diagnosis of disease and as key components in pharmaceuticaland other high technology manufacturing. We have customers in life sciencecompanies, university and government institutions, hospitals and in industry.Over one million scientists and technologists use our products. Sigma-Aldrichoperates in 36 countries and has 8,000 employees providing excellent serviceworldwide. We are committed to accelerating our Customers' success throughleadership in Life Science, High Technology and Service. For more informationabout Sigma-Aldrich, please visit our award winning web site athttp://www.sigma-aldrich.com.