2-Naphthalenesulfonic acid, 4-hydroxy-7-((((5-hydroxy-6-((2-methylphenyl)azo)-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-((2-methyl-4-sulfophenyl)azo)-, trisodium salt 222548-25-6 6420-43-5 EINECS 229-163-8 Trisodium 4-hydroxy-7-((((5-hydroxy-7-sulphonato-6-((o-tolyl)azo)-2-naphthyl)amino)carbonyl)amino)-3-((2-methyl-4-sulphonatophenyl)azo)naphthalene-2-sulphonate