121-57-3 22484-64-6 4-Aminobenzenesulfonic acid 4-Sulfanilic acid 515-74-2 AI3-15414 Aniline-4-sulfonic acid Aniline-p-sulfonic acid Aniline-p-sulphonic acid Benzenesulfonic acid, 4-amino- CCRIS 4576 EINECS 204-482-5 HSDB 5590 Kyselina sulfanilova [Czech] NSC 7170 SULFANILIC ACID Sulfanilsaeure [German] Sulphanilic acid p-Aminobenzenesulfonic acid p-Aminophenylsulfonic acid