Used as a high-performance fluorescent whitening agent in plastics and synthetic fibers, particularly in polyamide and polyester materials. Enhances brightness and optical clarity by absorbing ultraviolet light and emitting blue fluorescence, counteracting yellowish tones. Also employed in coatings and inks where improved whiteness and light stability are required. Its molecular structure provides excellent thermal stability and compatibility with polymer matrices, making it suitable for high-temperature processing applications.