Used as a high-performance ultraviolet (UV) stabilizer in organic photovoltaic devices and perovskite solar cells. It effectively suppresses UV-induced degradation by scavenging free radicals and quenching excited states, enhancing device longevity and operational stability. Also applied in specialty polymers and coatings requiring resistance to photodegradation, especially in outdoor-exposed materials. Its lipophilic side chain improves compatibility in nonpolar matrices, enabling uniform dispersion and sustained protection.