But-1-en-2-ylbenzene is primarily used in organic synthesis as an intermediate in the production of various chemicals and polymers. It serves as a key building block in the manufacture of specialty chemicals, including fragrances and flavoring agents, due to its aromatic and unsaturated structure. Additionally, it is utilized in the development of certain types of resins and coatings, where its reactivity allows for the creation of durable and stable materials. In research, it is often employed in studies related to polymerization reactions and the synthesis of complex organic compounds. Its unique structure makes it valuable in exploring new chemical pathways and developing innovative industrial applications.