Used primarily as a plasticizer in polyvinyl chloride (PVC) and other polymers to improve flexibility, durability, and workability. It is especially effective in applications requiring good low-temperature performance and resistance to extraction by water or oils. Commonly found in wire and cable insulation, automotive parts, flooring, and synthetic leather. Its branched ester structure provides enhanced solubility in polymer matrices and reduced volatility compared to shorter-chain plasticizers. Also used in some sealants and adhesives where long-term flexibility is required.