2-Naphthalenesulfonic acid, 6-amino-5-((2,5-dichlorophenyl)azo)-4-hydroxy- 6-Amino-5-((2,5-dichlorophenyl)azo)-4-hydroxy-2-naphthalenesulfonicacid 6-Amino-5-((2,5-dichlorophenyl)azo)-4-hydroxynaphthalene-2-sulphonic acid 68227-43-0 EINECS 269-355-9