2,7-Naphthalenedisulfonic acid, 3,6-dihydroxy-, disodium salt 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid, disodium salt 7153-21-1 Disodium 3,6-dihydroxynaphthalene-2,7-disulphonate EINECS 230-499-2 NSC 62688 Sodium 2,7-Dioxynaphthalene-3,6-disulfonate