Synonyms: Ammonium,[4-[(4,6-diamino-m-tolyl)imino]-2,5-cyclohexadien-1-ylidene]dimethyl-, chloride(8CI); Methanaminium,N-[4-[(2,4-diamino-5-methylphenyl)imino]-2,5-cyclohexadien-1-ylidene]-N-methyl-,chloride (9CI); Toluylene blue (6CI);[4-[(4,6-Diamino-m-tolyl)imino]-2,5-cyclohexadien-1-ylidene]dimethylammoniumchloride (7CI); C.I. 49410; Toluylene blue (biological stain)