1,7-Diamino-8-naphthol-3,6-disulfonic acid 1,7-Diamino-8-naphthol-3,6-disulphonic acid 2-14-00-00504 (Beilstein Handbook Reference) 3,6-NAPHTHALENEDISULFONIC ACID, 1,7-DIAMINO-8-HYDROXY- 3545-88-8 BRN 3110297