Synonyms: Ammonium,[6-(dimethylamino)-3H-thioxanthen-3-ylidene]dimethyl-, chloride (8CI);Methanaminium, N-[6-(dimethylamino)-3H-thioxanthen-3-ylidene]-N-methyl-,chloride; Thioxanthylium, 3,6-bis(dimethylamino)-, chloride (9CI);[6-(Dimethylamino)-3H-thioxanthen-3-ylidene]dimethylammonium chloride (7CI);C.I. 45006; Methylene Red; Thiopyronin; Thiopyronine