Synonyms: 2,7-Naphthalenedisulfonicacid, 4-(acetylamino)-5-hydroxy-, disodium salt (9CI);2,7-Naphthalenedisulfonic acid, 4-acetamido-5-hydroxy-, disodium salt (8CI);Disodium 1-acetamido-8-hydroxy-3,6-naphthalenedisulfonate; Sodium1-acetamido-8-hydroxynaphthalene-3,6-disulfonate