Used primarily as a plasticizer in polymers, especially in polyvinyl chloride (PVC) and related plastics to improve flexibility, workability, and durability. It enhances low-temperature performance and resistance to aging, making it suitable for cables, hoses, films, and flexible tubing. Also employed in synthetic lubricants for improved viscosity and thermal stability. Its low volatility and good solubility characteristics make it useful in coatings, adhesives, and sealants where long-term performance is required.