Used primarily as a plasticizer in specialty polymers requiring high thermal stability and low volatility. Offers excellent resistance to heat and UV degradation, making it suitable for outdoor applications in coatings, sealants, and adhesives. Commonly found in high-performance rubber compounds and engineering plastics where long-term durability is critical. Also utilized in some resin systems to improve flexibility and impact resistance without compromising chemical resistance. Due to its steric hindrance from bulky tert-butyl groups, it exhibits slower migration and extraction rates compared to other phthalates, enhancing the longevity of the final product.