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Industrial Grade Ox-Base Purity 99.5% Min Phthalic Anhydride CAS No 85-44-9, Find Details and Price about Phthalic Anhydride Phthalic Anhydride Flake from Industrial Grade Ox-Base Purity 99.5% Min Phthalic Anhydride CAS No 85-44-9 - Achilles Chemical Co., Ltd.