135-51-3 148-75-4 2,7-NAPHTHALENEDISULFONIC ACID, 3-HYDROXY-, DISODIUM SALT 2-Naphthol-3,6-disulfonic acid sodium salt 2-Naphthol-3,6-disulfonic acid, disodium salt 3-Hydroxynaphthalene-2,7-disulfonic acid, disodium salt 3-Hydroxynapthlene-2,7-disulfonic acid sodium salt 39301-76-3 AI3-28535 CCRIS 7448 Disodium 2-hydroxy-3,6-naphthalene disulfonate Disodium 2-naphthol-3,6-disulfonate Disodium 3-hydroxynaphthalene-2,7-disulphonate EINECS 205-196-3 Fericon Ferricon NSC 5872 R salt R-salt