An effective light stabilizer that protects plastics and paints from UV radiation in natural light. It is effective in improving the light fastness of dyes on polyester window films and polyester fabrics. It is especially useful for reducing the transmission of UV light through polyester window films. It can also improve the durability of dyed textiles, prevent yellowing of wool fabrics and prevent fading of synthetic fabrics. Mainly used in water-soluble chemical sunscreen, sunscreen, emulsion. At the same time, it can be used in hair gel, mousse and other hair care products to prevent hair damage caused by ultraviolet radiation to turn white.