2-Naphthalenesulfonic acid, 7-(acetylamino)-4-hydroxy-, monosodium salt 42360-29-2 6-Acetamido-1-naphthol-3-sulfonic acid, monosodium salt EINECS 255-776-5 NSC 134814 Sodium 2-acetamido-5-hydroxynaphthalene-7-sulphonate