Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 57-41-0, Whether you call it Phenytoin, 5 -5-Diphenylhydantoin or 5 -5-Diphenylimidazolidine-2 -4-dione you can be assured the Phenytoin products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.