3-Hydroxy-naphthalin-2,6-disulfonsaeure,Natriumsalz, Disodium 2-naphthol-3,7-disulfonate, 3-hydroxy-naphthalene-2,6-disulfonic acid,sodium salt, disodium 3-hydroxynaphthalene-2,6-disulfonate, EINECS 281-406-7, Disodium 3-hydroxynaphthalene-2,6-disulphonate, 2-Naphthol-3,7-disulphonate acid disodium salt, Sodium 2-naphthol-3,7-disulfonate