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2,4-Diaminobenzenesulfonic acid - is an sulfonated aromatic amine and its aerobic biodegradation was reported in the preparation of sulfonated homo- and random co-polyimides.
D 3941 (OTTO) 2,4-Diaminobenzenesulphonic acid, 98% Cas 88-63-1 - used in preparation of sulfonated homo- and random co-polyimides.