1,3-Naphthalenedisulfonic acid, 7-hydroxy- 118-32-1 2-Hydroxynaphthalene-6,8-disulfonic acid 2-Naphthol-6,8-disulfonic acid 7-Hydroxy-1,3-naphthalenedisulfonic acid 7-Hydroxynaphthalene-1,3-disulphonic acid EINECS 204-245-6 G Acid NSC 2073 beta-Naphthol-gamma-disulfonic acid beta-Naphtholdisulfonic acid G