1,5-Hexadiene is primarily used as a monomer in the production of various polymers and copolymers. Its diene structure allows it to participate in polymerization reactions, making it valuable in the synthesis of specialty plastics and elastomers. Additionally, it serves as a cross-linking agent in the manufacturing of adhesives, coatings, and resins, enhancing their durability and mechanical properties. In organic synthesis, 1,5-hexadiene is utilized as a building block for creating complex molecules, particularly in the development of pharmaceuticals and agrochemicals. Its reactivity also makes it useful in research and development for studying polymerization mechanisms and creating novel materials.