Phenytoin USP 5 g^ Phenytoin, USP, Appearance: Powder, Color: White, Cas number: 57-41-0, Molecular Weight: 252.27 g/mole, Formula: C15-H12-N2-O2, Synonyms: 5, 5-Diphenylhydantoin, 5, 5-Diphenylimidazolidine-2, 4-dione, Diphenylhydantoin, Diphenylhydantoine (French), Fenitoina, Fentoin, Size: 5 g This listing is for Each