ST. LOUIS, March 13 — Sigma-Aldrich (Nasdaq: SIAL) today announced that it has expanded its presence in the Republic of Chile to directly serve research and manufacturing customers throughout the country. The Company has acquired Sigal Ltda, its primary distributor in Chile, and established Sigma-Aldrich Quimica Ltda to provide a foundation for future growth in the country.

“Building on our strong customer base in Chile and throughout Latin America is a long-term strategy for Sigma-Aldrich,” said Eric Green, Vice President of International Sales and Operations. “We experienced 20% sales growth in Latin America in 2008 alone, and we believe our expanded presence in Chile, which will integrate sales, marketing and distribution, provides a solid base for consistent growth in the years to come.”

Sigma-Aldrich’s expansion of operations in Chile is part of the Company’s strategic plan to accelerate growth in Canada, Asia Pacific and Latin America (CAPLA) to 25% of corporate sales by 2010. In line with this strategy, in October 2008 Sigma-Aldrich established a representative office in Vietnam to serve the country’s expanding research and manufacturing sectors.

Santiago-based Sigal Ltda was established in 1997 to supply research products to customers in Chile. Its General Manager, Patricia Bravo, will become Sigma-Aldrich’s Sales and Marketing Manager for Chile. Terms of the deal were not disclosed.

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 37 countries and has 7,900 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.

Cautionary Statement: This release contains forward-looking statements relating to future performance, goals, strategic actions and initiatives and similar intentions and beliefs and other statements regarding the Company’s expectations, goals, beliefs, intentions and the like, which involve assumptions regarding the Company’s operations and conditions in the markets the Company serves. The Company does not undertake any obligation to update these forward-looking statements.

Sigma-Aldrich is a registered trademark of Sigma-Aldrich Biotechnology LP and Sigma-Aldrich Co.

SOURCE Sigma-Aldrich