1,2,4-Acid 1-Amino-2-naphthol-4-sulfonic acid 1-Amino-4-sulfo-2-naphthol 1-NAPHTHALENESULFONIC ACID, 4-AMINO-3-HYDROXY- 116-63-2 2-Hydroxy-4-sulfo-1-naphthylamine 4-Amino-3-hydroxy-1-naphthalenesulfonic acid 4-Amino-3-hydroxynaphthalene-1-sulphonic acid 4-Amino-3-hydroxynaphthalenesulfonic acid AI3-03701 EINECS 204-147-3 NSC 25061