Biogenesis
Supplies immunoassay reagents to research laboratories and diagnostics manufacturers.

Chemical.net
A directory of chemicals, lab supplies, and other laboratory items. A technical forum, and links to MSDS information are also available. (Registration required for full use, numerous pop-ups)

China Greatvista Chemicals
Supplier of a wide range of chemical and biochemical products for scientific and industrial applications.

MVS Solutions Incorporated
Provides chemistry development and chemistry support to business, government, the military, and nonprofit organizations.

Ryscor Science
Specializing in custom chemical synthesis and boron chemistry.