Used primarily as a plasticizer in polymers, especially in polyvinyl chloride (PVC) and other synthetic resins. It improves flexibility, workability, and durability at low temperatures, making it suitable for applications in automotive parts, wire and cable coatings, flooring, and flexible films. Its branched ester structure provides good resistance to extraction by oils and water, enhancing the longevity of plastic products. Also valued for low volatility and thermal stability, it is used in applications requiring prolonged heat exposure. Additionally, it serves as a raw material in the synthesis of other esters and specialty chemicals.