Sigma-Aldrich Shareholders Elect Directors and Ratify Auditor; Directors Declare Quarterly Dividend

ST. LOUIS, May. 06 /PRNewswire/ --

ST. LOUIS, May 6 /PRNewswire-FirstCall/ -- At the annual shareholders meeting of Sigma-Aldrich Corporation held today in St. Louis, the following directors were re-elected: David R. Harvey, W. Lee McCollum, Jai P. Nagarkatti, Avi M. Nash, Steven M. Paul, J. Pedro Reinhard, Timothy R. G. Sear, D. Dean Spatz and Barrett A. Toan. Rebecca M. Bergman, Vice President for Science and Technology of Medtronic, Inc., was elected to her first term as a Director. William C. O'Neil, Jr. retired as a Director after serving in that role for 21 years. Shareholders also ratified the appointment of KPMG LLP as the Company's independent registered public accountant for 2008.

At the Board of Directors meeting held today, the Directors declared a quarterly cash dividend of $.13 per share. The dividend is payable on June 13, 2008 to shareholders of record on May 30, 2008.

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 36 countries and has 7,900 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.