Used as an antioxidant in polymers and plastics, especially in polyolefins like polyethylene and polypropylene. It prevents degradation caused by heat and oxygen during processing and long-term use. Also applied in rubber and adhesives to improve thermal stability and extend service life. Effective in high-temperature environments due to its sterically hindered structure, which enhances resistance to oxidation. Commonly used in automotive parts, cables, and packaging films where durability is critical.