Ultraviolet absorber UV-284 (BP-4)

　　Chemical name: 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid

　　English name: 2-Hydorxy-4-methoxy-benzophenone-5-Sulphonic Acid

　　Molecular formula: C14H12O6S

　　Molecular weight: 308.31

　　Appearance light yellow powder

　　Content ≥99.0%

　　Melting point 110-120℃

　　Loss on drying ≤3%

　　PH 1.2-1.8 (1% aqueous solution)

　　Light absorption 285nm z≥416

　　325nm z≥256

　　Features and uses: This product is non-toxic, non-flammable, non-explosive, and easily absorbs moisture in the air. It is an acidic aqueous solution ultraviolet absorber with excellent performance and can strongly absorb 290-400nm ultraviolet light. Widely used as a UV absorber for water-based polymer coatings and shellac paint to prevent the photocatalytic oxidation of water-based polymer coatings and shellac paint; it is a good cosmetic sunscreen and UV absorber for improving the weather resistance of wool textiles . The general dosage is 0.2-1.5%.

　　Packing: High-pressure cardboard drum, net weight 20kg.