Used primarily as an antioxidant in polymers and elastomers, especially in rubber products such as tires, hoses, and belts, to prevent degradation caused by oxygen and ozone. It protects against thermal aging and extends the service life of rubber components exposed to high temperatures and dynamic stress. Also employed in polyolefins and other plastics to maintain mechanical properties and color stability during processing and long-term use. Its high molecular weight and low volatility make it suitable for applications requiring prolonged performance under harsh conditions.