Polyacrylonitrile is widely used in the textile industry as a precursor for the production of acrylic fibers. These fibers are known for their durability, resistance to chemicals, and ability to retain shape, making them ideal for clothing, upholstery, and outdoor fabrics. Additionally, it serves as a key material in the manufacturing of carbon fibers, which are essential in aerospace, automotive, and construction industries due to their high strength-to-weight ratio. It is also utilized in filtration systems for its ability to create membranes that effectively separate and purify substances. In the medical field, it is employed in dialysis membranes and other biomedical applications due to its biocompatibility and stability.