2-Naphthalenesulfonic acid, 6-amino-3-((4-chloro-5-methyl-2-sulfophenyl)azo)-4-hydroxy-, disodium salt 68227-39-4 Disodium 6-amino-3-((4-chloro-5-methyl-2-sulphonatophenyl)azo)-4-hydroxynaphthalene-2-sulphonate EINECS 269-351-7