Synonyms: 2-Naphthalenesulfonicacid,7,7'-[(6-morpholino-s-triazine-2,4-diyl)diimino]bis[4-hydroxy-3-[(4-methoxy-2-sulfophenyl)azo]-,tetrasodium salt (7CI,8CI); 2-Naphthalenesulfonic acid,7,7'-[[6-(4-morpholinyl)-1,3,5-triazine-2,4-diyl]diimino]bis[4-hydroxy-3-[(4-methoxy-2-sulfophenyl)azo]-,tetrasodium salt (9CI)