Used primarily as a stabilizer and antioxidant in polymers, particularly in PVC and other plastics, as well as in rubber and paints, to prevent degradation caused by heat and light. It helps in maintaining the material's integrity and prolonging its lifespan by inhibiting oxidation processes. Additionally, it is employed in lubricants and hydraulic fluids to enhance their performance and stability under high-temperature conditions. Its role in these applications is crucial for ensuring the durability and efficiency of the end products.