2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-((4-(2-(sulfooxy)ethoxy)phenyl)azo)- 68400-37-3 7-Amino-4-hydroxy-3-((4-(2-(sulfooxy)ethoxy)phenyl)azo)-2-naphthalenesulfonic acid 7-Amino-4-hydroxy-3-((4-(2-(sulphooxy)ethoxy)phenyl)azo)naphthalene-2-sulphonic acid EINECS 270-026-7