Used as an antioxidant in polymers, particularly in rubber and plastic materials, to protect against degradation caused by heat, light, and oxygen. It helps extend the service life of rubber products such as tires, hoses, and belts by preventing cracking and hardening. Also employed in adhesives and sealants to maintain flexibility and strength over time. Its sterically hindered structure provides effective radical scavenging, making it suitable for high-performance applications where long-term stability is required.