Used primarily as an antioxidant in polymers and plastics to prevent degradation caused by heat, light, and oxygen exposure. It helps maintain material strength, color, and flexibility during processing and long-term use. Commonly added to polyolefins such as polyethylene and polypropylene used in packaging, automotive parts, and household goods. Also found in adhesives, sealants, and rubber products to extend service life by inhibiting oxidative breakdown. Its ester structure enhances compatibility with organic matrices, allowing for uniform dispersion and sustained protective effects.