7-Anilino-4-hydroxy-2-naphthalenesulfonic acid sodium salt 2-Naphthalenesulfonic acid, 4-hydroxy-7-(phenylamino)-, monosodium salt 2-Naphthalenesulfonic acid, 4-hydroxy-7-(phenylamino)-, sodium salt (1:1) 2-Naphthalenesulfonic acid, 7-anilino-4-hydroxy-, monosodium salt Einecs 269-272-8 sodium 4-hydroxy-7-(phenylamino)naphthalene-2-sulphonate 4-Hydroxy-7-(Phenylamino)-2-Naphthalenesulfonic Acid Sodium Salt