1-Aminobenzene-3-sulfonic acid 1126-34-7 121-47-1 3-AMINOBENZENESULFONIC ACID 3-Amino-benzenesulfonic acid 3-Aminobenzenesulphonic acid 4-14-00-02647 (Beilstein Handbook Reference) AI3-23215 Aminobenzenesulfonic acid BRN 0473264 Benzenesulfonic acid, 3-amino- CCRIS 2760 EINECS 204-473-6 Kyselina anilin-3-sulfonova [Czech] Kyselina metanilova [Czech] Metanilic acid NSC 4504 m-Aminobenzenesulfonic acid m-Anilinesulfonic acid m-Sulfanilic acid