Mesalazine EP Impurity O

1-Aminobenzene-4-sulfonic Acid;|4-aminobenzenesulfonic acid (sulfanilic acid).;|4-aminobenzenesulfonic acid (sulfanilic acid).; Mesalamine EP Impurity O|4-Aminobenzenesulfonic Acid;|4-Aminophenylsulfonic Acid;|4-Sulfoaniline;|Aniline-4-sulfonic Acid;|Aniline-p-sulfonic Acid;|Mesalamine EP Impurity O|NSC 7170; Sulphanilic Acid; p-Aminobenzenesulfonic Acid;|p-Aminophenylsulfonic Acid;|p-Sulfoaniline;|Sulfamethoxazole EP Impurity D;|Sulfamethoxazole EP Impurity D.|Sulfanilic acid ;