Disodium 6-hydroxy-5-[(2-methoxy-4-sulphonato-m-tolyl)azo]naphthalene-2-sulphonate and its permitted lakes and salts
6-hydroxy-5-[(2-méthoxy-4-sulfonato-m-tolyl)azo]naphtalène-2-sulfonate de disodium et ses laques et sels autorisés