Isophthaloyl chloride

Isophthaloyl chloride (CAS 99-63-8), also known as IPC or m-phthaloyl chloride, is a reactive diacid chloride monomer used to build high-performance polymer chains through acylation reactions.

Where is Isophthaloyl chloride used?

• Aramids, polyamides and polyesters: building block where thermal stability and mechanical strength are end targets
• Aramid fiber production: reacts with aromatic diamines to form meta-aramid polymers, basis of heat-resistant textiles for protective apparel and industrial filtration
• Polyamide and polyester resins: introduces isophthalate units that improve flexibility and chemical resistance
• Coatings and adhesives: cross-linking agent that builds dense polymer networks for high-temperature or chemically aggressive service
• Pharmaceutical synthesis: acylating intermediate for active ingredients and specialty amide-bond-containing compounds

Commercial specifications

• Standard commercial grades for industrial and synthesis-scale applications
• High-purity grades for pharmaceutical and fine chemical manufacturing
• Packaging from small laboratory quantities to bulk volumes for polymer production