1,2-Epoxy-5-hexene is primarily used as a reactive intermediate in organic synthesis. Its epoxide group makes it valuable for ring-opening reactions, which are essential in producing various polymers, resins, and specialty chemicals. It is often employed in the manufacture of adhesives, coatings, and elastomers, where its ability to cross-link with other compounds enhances material properties like durability and flexibility. Additionally, it serves as a building block in the synthesis of fine chemicals and pharmaceuticals, particularly in creating complex molecular structures. Its versatility in chemical reactions makes it a useful component in industrial and research applications.