(4-(p-(Diethylamino)-alpha-(p-(N-methyl-m-sulfoanilino)phenyl)benzylidene)-2,5-cyclohexadien-1-ylidene)diethylammonium hydroxide, inner salt 6104-57-0 Ammonium, (4-(p-(diethylamino)-alpha-(p-(N-methyl-m-sulfoanilino)phenyl)benzylidene)-2,5-cyclohexadien-1-ylidene)diethyl-, hydroxide, inner salt