Used primarily as a heat stabilizer and antioxidant in polymers, especially in polyolefins such as polyethylene and polypropylene. It helps protect materials from thermal degradation during processing and extends the service life of plastic products exposed to high temperatures. Effective in wire and cable insulation, automotive components, and packaging films where long-term heat resistance is required. Also compatible with other stabilizers, allowing synergistic formulations for enhanced performance in demanding environments.