Producer of biochemical and organic chemical products and kits. The products are used in scientific and genomic research, biotechnology, pharmaceutical development, the diagnosis of disease, and chemical manufacturing. Parent/holding company with high-tech operating units involved in chemicals, subassemblies and chromatography equipment. Products are sold to multiple industries. The bulk of revenue is derived from activity in the biotechnology industry. This company was capitalized by private investment. Stock symbol: SIAL. International sales are over 25% of sales. Products include immunology substrates, immunology reagents.