1,6-Naphthalenedisulfonic acid, 8-amino- 1-Amino-3,8-disulfonaphthalene 1-Naphthylamine, 3,8-disulfo- 1-Naphthylamine-3,8-disulfonic acid 129-91-9 8-Amino-1,6-naphthalenedisulfonic acid Aminoepsilon acid Epsilon acid NSC5524