Used primarily as a comonomer in the production of polyethylene, especially linear low-density polyethylene (LLDPE), 1-decene enhances flexibility, toughness, and impact resistance in plastic films. It is also employed in the synthesis of synthetic lubricants, providing high thermal stability and low volatility in engine oils and industrial fluids. Additionally, it serves as an intermediate in the manufacture of surfactants, detergents, and oil additives through processes like alkylation and oligomerization. Its reactivity in hydroformylation reactions makes it valuable for producing aldehydes and alcohols used in plasticizers and fragrance compounds.