Einecs 280-090-8

7-Amino-4-hydroxy-3-phenylazo-2-naphthalenesulfonic acid

6-Amino-1-hydroxy-2-(phenylazo)naphthalene-3-sulfonic acid

3-(Phenylazo)-4-hydroxy-7-amino-2-naphthalenesulfonic acid

7-amino-4-hydroxy-3-(phenylazo)naphthalene-2-sulphonic acid