Used primarily as a photostabilizer in polymers and coatings, this compound helps prevent degradation caused by UV light exposure. It is especially effective in protecting plastics, such as polycarbonates and polyesters, from yellowing and loss of mechanical strength when exposed to sunlight. Due to its strong UV absorption in the 300–400 nm range, it is incorporated into clear films, automotive coatings, and exterior building materials to enhance durability and lifespan. Its triazine core contributes to thermal stability, making it suitable for high-processing-temperature applications. It is often used in combination with other stabilizers like HALS (hindered amine light stabilizers) for synergistic effects.