Chemical name: 2-(2'-Hydroxy-5'-methylphenyl)benzotriazole CAS No.:2440-22-4                               Molecular formula:C13H11N3O Molecular weight:225.3                                                                                    Appearance: White to yellowish crystal powder Melting point,℃:128-132 Assay (HPLC), %: ≥99 Ash, %: ≤0.1 Volatility, %: ≤0.5 Light transmittance, %: 440nm≥94%      500nm≥97%                                                        UV ABSORBER HOSORB-UVP is a benzotriazole type ultraviolet light absorber (UVA). The max absorbing wavelength range is 270-380nm. It is widely used in a variety of polymers including polypropylene polycarbonate, polyethylene, polyurethane, unsaturated resin, ABS resin, epoxy resin, PMMA, PVC, elastomer, adhesive etc. It almost does not absorb visible light, especially for colorless and transparent products.  info at hhochem. com