1-Naphthalenesulfonic acid, 2-amino- 2-AMINO-1-NAPHTHALENESULFONIC ACID 2-Aminonaphthalene-1-sulphonic acid 2-Naphthylamine-1-sulfonic acid 4-14-00-02792 (Beilstein Handbook Reference) 68540-41-0 81-16-3 BRN 0613084 EINECS 201-331-5 HSDB 5239 Kyselina 2-naftylamin-1-sulfonova [Czech] Kyselina tobiasova [Czech] NSC 5523 Tobias acid