Used as a stabilizer in polymers, particularly in polyolefins such as polyethylene and polypropylene. It prevents degradation caused by heat and oxidation during processing and long-term use. Offers excellent thermal stability and compatibility with other additives like antioxidants and UV stabilizers. Commonly applied in films, molded parts, and fibers where extended service life and resistance to aging are required. Also effective in lubricants and industrial oils to inhibit oxidation and maintain performance under high-temperature conditions.