205765-46-4 3,3'-(Sulfonylbis(4,1-phenyleneoxy))bisbenzenamine 3,3'-(Sulphonylbis(4,1-phenyleneoxy))dianiline 30203-11-3 Benzenamine, 3,3'-(sulfonylbis(4,1-phenyleneoxy))bis- EINECS 250-091-8