This chemical is primarily utilized as a high-performance phosphite antioxidant in polymer stabilization. It is particularly effective in protecting polymers such as polyolefins (e.g., polyethylene, polypropylene) from thermal degradation and oxidative damage during processing and long-term use. Its robust structure allows it to scavenge free radicals and decompose hydroperoxides, thereby extending the lifespan and maintaining the mechanical properties of the polymer. Additionally, it is often used in combination with other antioxidants to enhance synergistic effects, ensuring optimal performance in demanding applications like automotive parts, packaging materials, and industrial plastics. Its ability to function effectively at high temperatures makes it suitable for use in extrusion, injection molding, and other high-heat polymer processing techniques.