Adrich Chemical (Sigma- Aldrich (also known as Sigma-Aldrich) is one of the top 10 global manufacturers of precision chemical materials. Founded in 1951 in St. Louis, Missouri, Aldrich is dedicated to providing biochemical and organic chemical products and kits for genomic research, biotechnology, drug development, disease diagnosis and other scientific fields; it was ranked No. 1512 in the 2014 Forbes Global 2000.