Sodium2-hydroxynaphthalene-7-sulfonate;Sodium7-hydroxy-2-naphthalenesulfonate;2-Naphthalenesulfonicacid, 7-hydroxy-, monosodium salt (8CI,9CI);2-Naphthol-7-sulfonic acid, sodiumsalt (6CI);2-Naphthol-7-sodium sulfonate;7-Hydroxynaphthalene-2-sulfonic acidsodium salt;7-Sulfo-2-naphthol sodium salt;
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