Anti-uv absorber UV531 is a commonly used UV absorber, also known as 2-hydroxy-4-methoxyphenyltriazine. It is mainly used to prevent the destruction of substances by ultraviolet rays, especially in plastics, coatings, rubber and fibers and other materials. The production of UV531 usually requires the following steps: Raw material preparation: Prepare the raw materials of 2-hydroxy-4-methoxyphenyltriazine, such as p-toluene, ammonia and nitric acid. Reaction preparation: the reaction of p-toluene with ammonia water to produce 2-hydroxy-4-methoxyphenyltriazine. Crystallization separation: The reaction product is crystalline separation to obtain pure UV531. Drying treatment: The resulting UV531 is dried to remove moisture and other impurities. Packaging and storage: The dried UV531 is packaged and stored to ensure the quality and stability of the product. It should be noted that the production of UV531 needs to be carried out in a professional chemical plant or laboratory to ensure the safety of the operation and the quality of the product. At the same time, the production process needs to comply with the relevant safety operating procedures and environmental protection requirements.