2-Naphthalenesulfonic acid, 6-((2,4-diaminophenyl)azo)-3-((4-((4-((7-((2,4-diaminophenyl)azo)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)phenyl)amino)-3-sulfophenyl)azo)-4-hydroxy-, sodium salt 83221-67-4 EINECS 280-246-5 Sodium 6-((2,4-diaminophenyl)azo)-3-((4-((4-((7-((2,4-diaminophenyl)azo)-1-hydroxy-3-sulpho-2-naphthyl)azo)phenyl)amino)-3-sulphophenyl)azo)-4-hydroxynaphthalene-2,7-disulphonate