2-Naphthalenesulfonic acid, 8-((4-amino-2,5-dimethoxyphenyl)azo)-5-((3-sulfophenyl)azo)-, disodium salt 68214-02-8 8-((4-Amino-2,5-dimethoxyphenyl)azo)-5-((3-sulfophenyl)azo)-2-naphthalenesulfonic acid, disodium salt Disodium 8-((4-amino-2,5-dimethoxyphenyl)azo)-5-((3-sulphonatophenyl)azo)naphthalene-2-sulphonate EINECS 269-282-2