The chemical Azure B has a designated molecular formula of C15H16ClN3S and a molecular weight of 305.824 g/mol. Synonyms may include: C.I. 52010, AZUR I, Azure I, 3-(Dimethylamino)-7-(methylamino)-phenothiazin-5-ium chloride, 3-(Dimethylamino)-7-(methylimino)-3H-phenothiazine hydrochloride, EINECS 208-511-2, 3-Methylamino-7-dimethylaminophenzathonium chloride, Methylene azure B, Methylene Azure (VAN), Modr Kresylova BB [Czech] (ChemID).