1,3,3-Trimethyl-2-((methyl(4-(phenylazo)phenyl)hydrazono)methyl)-3H-indolium sulphate (2:1) 3H-Indolium, 1,3,3-trimethyl-2-((methyl(4-(phenylazo)phenyl)hydrazono)methyl)-, sulfate (2:1) 83949-96-6 EINECS 281-453-3