Used primarily as a plasticizer in polyvinyl chloride (PVC) and other polymer systems, especially where high-temperature resistance and good electrical insulation properties are required. It provides excellent heat stability and low volatility, making it suitable for applications such as wire and cable insulation, automotive parts, and industrial hoses. Offers good resistance to extraction by water and oils, enhancing durability in demanding environments. Also used in radiation-resistant formulations due to its stable molecular structure. Common in flexible PVC products that must maintain performance under prolonged thermal stress.