Ultraviolet Absorbent Ultraviolet Absorber , UV-9, UV-531 Light Yellow Crystalline Powder,In 25KG Drum High Quality Ultraviolet AbsorbentUV-9Molecular FormulaC14H12O3CAS ... DrumStorageKept in dry , well-ventilated placeUsages:Absorbing medium UV ;Improving weatherability and prolonging life of products (especially ... weatherability and prolonging life of products . Ultraviolet Absorbent (UV-9, UV-531)