3-((4-(Ethyl(phenylmethyl)amino)phenyl)azo)-4-((4-methylphenyl)sulfonyl)benzenesulfonic acid 3-((4-(Ethyltolylamino)phenyl)azo)-4-(4-tolylsulphonyl)benzenesulphonic acid 68400-40-8 Benzenesulfonic acid, 3-((4-(ethyl(phenylmethyl)amino)phenyl)azo)-4-((4-methylphenyl)sulfonyl)- EINECS 270-029-3