Used primarily as a plasticizer in polymer formulations to improve flexibility and durability of plastics. Enhances low-temperature performance and elongation properties in polyvinyl chloride (PVC) and other synthetic resins. Commonly applied in wire and cable insulation, automotive parts, and flexible films due to its good thermal stability and resistance to extraction by water or oils. Also serves as a lubricant base stock and carrier fluid in specialty applications where biodegradability and low toxicity are desired.