Used primarily as a monomer in the synthesis of specialty polymers and copolymers, particularly in the production of styrenic resins with enhanced thermal and mechanical properties. Its vinyl group enables polymerization reactions, while the ethyl substituent influences solubility and compatibility in coating formulations. It serves as an intermediate in the development of functional materials for adhesives, sealants, and elastomers. Also employed in research for creating cross-linked polymers and functionalized surfaces due to its reactive aromatic and vinyl functionalities.