D-Biotin, Biotin CAS#: 58-85-5  Molecular Formula C10H16N2O3S  Molecular Weight 244.31  Synonyms Vitamin H; Vitamin B7; Hexahydro-2-oxo-1H-thieno[3,4-d]imidazole-4-pentanoic acid  Content: 99% pure, 1% Food grade, 1% Feed grade.