Used primarily as a stabilizer in polymers, especially in high-performance plastics and engineering resins. It protects materials against degradation caused by heat and oxidation during processing and long-term use. Commonly found in polyolefins, polycarbonates, and ABS plastics, it maintains mechanical strength and color stability under high-temperature conditions. Also employed in electronic components and automotive parts where thermal stability is critical. Effective in low concentrations, it is compatible with other additives like antioxidants and UV stabilizers, enhancing overall durability of the final product.