1,3-Benzenedicarbonyl dichloride, polymer with 1,4-benzenedicarbonyl dichloride, 2-chloro-1,4-benzenediamine dihydrochloride and 4,4'-sulfonylbis(benzenamine) 1,4-Benzenediamine, 2-chloro-, dihydrochloride, polymer with sulfonylbis(4-benzenamine), 1,4-benzenedicarbonyl dichloride and 1,3-benzenedicarbonyl dichloride 72986-52-8