Used primarily as a cross-linking agent in the production of ion exchange resins and polymer supports, enhancing mechanical and thermal stability. It improves the rigidity and porosity of resins used in water purification and pharmaceutical separations. Also employed in specialty polymers and as a monomer in the synthesis of functionalized polystyrene materials for chromatography and catalysis. Its reactive vinyl groups allow for post-polymerization modifications, making it valuable in developing tailored porous materials and functional coatings.