1,3-Naphthalenedisulfonic acid, 7-hydroxy-, disodium salt 187108-43-6 2-Naphthol-6,8-disulfonic acid, disodium salt 7-Hydroxynaphthalene-1,3-disulfonic acid, disodium salt 842-19-3 CCRIS 7449 Disodium 7-hydroxy-1,3-naphthalenedisulfonate Disodium 7-hydroxynaphthalene-1,3-disulphonate EINECS 212-674-5