2-Naphthalenesulfonic acid, 6-amino-5-((4-chloro-3-(((2,4-dimethylphenyl)amino)sulfonyl)phenyl)azo)-4-hydroxy-, monosodium salt 71873-39-7 EINECS 276-115-7 Sodium 6-amino-5-((4-chloro-3-(((2,4-dimethylphenyl)amino)sulphonyl)phenyl)azo)-4-hydroxynaphthalene-2-sulphonate