Used as an antioxidant in rubber and plastics, particularly effective in preventing oxidative degradation at high temperatures. Commonly added to tires and industrial rubber goods to extend service life by inhibiting cracking and hardening caused by heat and oxygen exposure. Also employed in lubricants and greases to improve thermal stability and reduce sludge formation. Its strong radical-scavenging properties make it valuable in polymer stabilization where long-term durability is required.