Synonyms: Benzo[a]phenazinium,5-[[4-(diethylamino)-3-sulfophenyl]amino]-9-[ethyl[(3-sulfophenyl)methyl]amino]-7-phenylsulfo-,hydroxide, inner salt, trisodium salt; Benzo[a]phenazinium,5-[[4-(diethylamino)-3-sulfophenyl]amino]-9-[ethyl[(3-sulfophenyl)methyl]amino]-7-phenylsulfo-,inner salt, trisodium salt (9CI)