3-((4-Carboxyphenyl)azo)-4-hydroxy-7-((((5-hydroxy-6-((2-methyl-4-sulfophenyl)azo)-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-2-naphthalenesulfonic acid, sodium salt 72245-49-9 Benzoic acid, 4-((1-hydroxy-6-((((5-hydroxy-6-((2-methyl-4-sulfophenyl)azo)-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-sulfo-2-naphthalenyl)azo)-, sodium salt