Synonyms: 2,7-Naphthalenedisulfonicacid,5-amino-4,5'-dihydroxy-3,4'-[(2-methoxy-5-methyl-p-phenylene)bis(azo)]di-,5'-benzenesulfonate (8CI); 2,7-Naphthalenedisulfonic acid,5-amino-4-hydroxy-3-[[2-methoxy-5-methyl-4-[[8-[(phenylsulfonyl)oxy]-3,6-disulfo-1-naphthalenyl]azo]phenyl]azo]-(9CI)