Synonyms: Benzo[a]phenazinium,9-[(2-methoxyphenyl)amino]-7-phenyl-5-(phenylamino)-4,10-disulfo-, hydroxide,inner salt, disodium salt; Benzo[a]phenazinium,9-[(2-methoxyphenyl)amino]-7-phenyl-5-(phenylamino)-4,10-disulfo-, inner salt,disodium salt (9CI)