4,4'-Tetramethyldiamino-4''-methoxytriphenylmethane-3''-sulfonic acid sodium salt 6310-59-4 Benzenesulfonic acid, 5-(bis(4-(dimethylamino)phenyl)methyl)-2-methoxy-, sodium salt EINECS 228-635-0 NSC 43921 Sodium 5-(bis(4-(dimethylamino)phenyl)methyl)-2-methoxybenzenesulphonate