Used primarily as a crosslinking agent in unsaturated polyester resins, enhancing thermal stability and mechanical strength of the final product. Commonly applied in the production of high-temperature resistant composites, electrical insulating materials, and castings. Also serves as a reactive diluent to reduce resin viscosity without compromising performance. Its ability to copolymerize with other monomers makes it valuable in specialty coatings and encapsulation resins where durability under heat and stress is required.