Used as an antioxidant in polymers and elastomers, particularly in rubber products like tires and hoses, to prevent degradation from heat, oxygen, and ozone. It helps extend the service life of rubber components by inhibiting oxidative aging and maintaining material flexibility and strength. Also employed in lubricants and greases to improve thermal stability and reduce sludge formation under high-temperature operating conditions. Its effectiveness in radical scavenging makes it suitable for stabilizing polyolefins and other engineering plastics during processing and long-term use.