Used as a photostabilizer in polymer systems, especially in plastics and coatings exposed to UV radiation. It helps prevent degradation caused by sunlight, maintaining material strength, color, and appearance over time. Commonly added to polyolefins, polycarbonates, and acrylics used in outdoor applications such as automotive parts, agricultural films, and exterior building materials. Also found in some specialty inks and adhesives where light stability is critical. Works by absorbing UV light and dissipating the energy as heat, reducing chain scission and oxidation in the host material.