2-Naphthalenesulfonic acid, 6-amino-5-((5-((4-chlorobenzoyl)amino)-2-sulfophenyl)azo)-4-hydroxy-, disodium salt 2-Naphthalenesulfonic acid, 6-amino-5-((5-((p-chlorobenzoyl)amino)-2-sulfophenyl)azo)-4-hydroxy-, disodium salt 70815-07-5