DXSORB®3638 is a benzoxazinone-based ultraviolet absorber that can absorb ultraviolet light in the range of 280-400 nanometers. It has the characteristics of high temperature resistance, extraction resistance, low volatility, low migration, a wide absorption range, and high absorption efficiency. It is a highly efficient and non-staining ultraviolet absorber. It is especially suitable for transparent PET films, sheets, and plates, as well as transparent PC films, sheets, and plates, etc. When added to photovoltaic materials, it can effectively block the damage of ultraviolet rays to battery materials and extend the lifespan of components. When added to optical films in display materials, such as diffusion films and hardening films, etc., it can prevent them from aging and yellowing, which may affect the display effect, maintain their optical and mechanical properties, and improve the display quality and the service life of the films. DXSORB®3638 of Danxia New Materials has been registered with the FDA and approved for food contact applications, such as PET bottles and food packaging films.