2-AMINOPHENOL-4-SULFONIC ACID 2-Amino-1-phenol-4-sulfonic acid 2-Amino-4-sulfophenol 2-Hydroxy-5-sulfoaniline 3-Amino-4-hydroxybenzenesulfonic acid 3-Amino-4-hydroxybenzenesulphonic acid 4-Hydroxy-3-aminobenzenesulfonic acid 4-Hydroxymetanilic acid 98-37-3 AI3-14898 Benzenesulfonic acid, 3-amino-4-hydroxy- CCRIS 4584 EINECS 202-662-8 Metanilic acid, 4-hydroxy- (8CI) NSC 1491 o-Aminophenol-p-sulfonic acid