Produces and sells a broad range of biochemicals, organic and inorganic chemicals and related products. Parent company of Sigma, Aldrich, Fluka and Supelco.

Manufacturer of chemicals, metals and materials for research, development and production applications. Includes product catalogue and contact information.

Inorganic chemical standards for analytical laboratories.

Organic synthesis company in Germany, offering a wide range of uncommon intermediate and reagent chemicals from a catalog, as well as general custom synthesis services.

Develops and produces perfluoroalkylating reagents and tags, and products for separating fluorous compounds. Overview of products, services, applications, and technology. Located in Pennsylvania.

Offers a wide range of compounds labeled with N15, C13, H2, O18 and metals. Specializing in custom synthesis and supplying Oxygen-18 water to the medical community.

Supplies stable isotope chemicals labeled with deuterium, nitrogen-15, carbon-13, oxygen-18 and other metal isotopes. Specializes in labeled vitamins and custom synthesis.

UK chemical and reagent manufacturer of laboratory and analytical chemicals.

Supplier in China of a wide range of chemicals in laboratory-scale quantities. Product list with specifications.

Producer and supplier of a diverse range of chemicals and reagents, aimed primarily at laboratory applications.