Widely used as an antioxidant in plastics, particularly polyolefins such as polyethylene and polypropylene. It prevents degradation caused by heat and oxidation during processing and extends the service life of plastic products. Commonly found in agricultural films, packaging materials, and molded or extruded parts exposed to high temperatures. Also used in synthetic lubricants and adhesives to improve oxidative stability. Effective in combination with other stabilizers like UV absorbers or phosphites for enhanced protection.