Used primarily as a monomer and intermediate in polymer chemistry, 2,4-dichlorostyrene is valued for its ability to enhance the thermal and chemical resistance of resulting polymers. Its structure allows for controlled modifications in copolymer systems, making it useful in specialty plastics and resins that require improved stability under harsh conditions. It is also employed in the synthesis of agrochemicals and pharmaceuticals, where the dichloro-substituted aromatic backbone serves as a key building block. Due to the reactivity of the vinyl group and chlorine substituents, it enables further functionalization for targeted molecular design in research and development.