ChemWhat is an online database and sourcing resource focused on chemicals and biological products. Its website helps users explore a broad range of materials by CAS Registry Number, enzyme EC Number, or product category, making it easier to navigate information across diverse areas of chemistry and biotechnology. Listed categories include analytical chemistry, antibodies, enzymes, chemical reagents, catalysts and auxiliaries, pesticides, dyes and pigments, flavors and fragrances, food additives, peptides, recombinant proteins, and pharmaceutical intermediates. The catalogue also covers advanced chemicals, organic building blocks, impurity reference standards, inorganic chemistry, OLED material intermediates, and polyethylene glycol products.

Alongside its database, ChemWhat presents products and custom services and identifies global sourcing as part of its offering. The site also provides an Unreliable Entity List and news, with information available in multiple languages. ChemWhat positions its resource around precision, completeness, and efficiency, serving visitors seeking to find or source chemical and biological materials. The company lists an address in London, United Kingdom.