1-Naphthalenesulfonic acid,4,5-dihydroxy-,monosodium salt, 4,5-Dihydroxynaphthalene-1-sulfonic acid,monosodium salt, Sodium 1,8-dihydroxynaphthate-4-sulfonate, 1-Naphthalenesulfonicacid,4,5-dihydroxy-,sodium salt (1:1), SODIUM 4,5-DIHYDROXYNAPHTHALENE-1-SULFONATE, Sodium 4,5-dihydroxynaphthalene-1-sulphonate, EINECS 259-015-8