Isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate is a high-efficiency hindered phenolic antioxidant with excellent compatibility and low volatility. It can effectively capture free radicals generated in the oxidation process of organic materials, inhibit the chain reaction of autoxidation, and thus prevent the thermal oxidative degradation and performance decline of materials during processing, storage and use.

It has good miscibility with a variety of polymers, resins, oils and organic solvents, and is not easy to migrate or bloom in the application system, which can maintain the long-term antioxidant effect of products. It is widely used in the anti-aging protection of polyolefin materials such as polyethylene and polypropylene, and can significantly improve the processing stability and heat resistance of polyolefin products, extending their service life.