(((4-(Diethylamino)phenyl)methylene)bis((3-methyl-4,1-phenylene)(ethylimino)methylene))bis(benzenesulphonic) acid (4-Diethylaminophenyl)bis(2-methyl-4-(N-ethyl-N-sulfobenzylamino)phenyl)methane 66225-58-9 68900-65-2 Benzenesulfonic acid, (((4-(diethylamino)phenyl)methylene)bis((3-methyl-4,1-phenylene)(ethylimino)methylene))bis- EINECS 272-618-0