Used primarily as a reactive intermediate in organic synthesis, particularly in the production of specialty polymers and resins. Its vinyl and chloro functional groups allow for polymerization and further chemical modifications, making it valuable in creating cross-linking agents and functional materials. Commonly employed in the development of ion-exchange resins, agrochemicals, and pharmaceuticals due to its ability to introduce aromatic and reactive chlorinated moieties into larger molecules. Also finds use in research settings for synthesizing styrene derivatives with tailored electronic or structural properties.