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CAS 25765-47-3 appears in our catalog under these names: 1,3-Benzenedicarbonyl dichloride, polymer with 1,3-benzenediamine, Poly[N,N'-(1,3-phenylene)isophthalamide]. Offered by: Chemat, Sigma-Aldrich. Available pack sizes: 100g, 5g, 25g.