ChemWhat is a chemical and biological database that helps users browse information on chemicals and enzymes. Its search tools organize chemical entries by CAS Registry Number and enzyme entries by EC number, while category-based browsing covers a broad range of scientific and commercial materials. Listed categories include advanced chemicals, analytical chemistry, antibodies, biochemical engineering, catalysts and supports, chemical pesticides, reagents, dyes and pigments, enzymes, flavors and fragrances, food additives, immunodiagnostic products, impurity reference standards, inorganic chemistry, OLED material intermediates, organic building blocks, peptides, pharmaceutical intermediates, polyethylene glycol, and recombinant proteins.

In addition to its database, ChemWhat features news, global sourcing, and custom services. The site presents its database around accuracy, completeness, and efficiency, and is available in multiple languages, including English, Urdu, French, Spanish, German, and Chinese. ChemWhat identifies its London address at Unit G25, Waterfront Studios, 1 Dock Road, E16 1AH, United Kingdom, and lists a D&B number. Its resources and services are relevant to people seeking chemical and biological product information or sourcing assistance.