1-Amino-5-naphthalenesufonic acid 1-Amino-5-sulfonaphthalene 1-Naphthalenesulfonic acid, 5-amino- 1-Naphthylamine-5-sulfonic acid 4-14-00-02800 (Beilstein Handbook Reference) 5-AMINO-1-NAPHTHALENESULFONIC ACID 5-Aminonaphthalene-1-sulphonic acid 5-Naphthylamine-1-sulfonic acid 84-89-9 BRN 2214149 EINECS 201-571-0 Laurent acid NSC 28691