Acid Brown 213 Chemical Name Acid Brown 213 C.I. No. 20175 CAS No. 6416-67-7 Synonyms Coriamine Brown B2C, Indacid Brown B2C, Lecotan Brown CGR, Sandal Acid Brown B2C, Sandal Acid Brown IBR Molecular Formula C24H17N5Na2O8S2 Molecular Weight 613.53002