4-Chlorostyrene is primarily used as a monomer in the production of specialized polymers and copolymers. Its incorporation into polymer chains enhances properties such as chemical resistance, thermal stability, and mechanical strength, making it valuable in manufacturing high-performance plastics. It is also utilized in the synthesis of resins and coatings, where it contributes to improved durability and adhesion. Additionally, 4-Chlorostyrene serves as an intermediate in organic synthesis, particularly in the development of pharmaceuticals and agrochemicals, where its reactive styrene and chlorine groups facilitate the creation of complex molecules. Its applications extend to research and development in material science, where it is studied for potential use in advanced materials and nanotechnology.