Chemical name: 2-(2'-Hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzortriazole  CAS No.:3896-11-5                               Molecular formula:C17H18ClN3O Molecular weight:315.8                                                              Appearance: Slightly yellow powder Assay (HPLC),%: ≥99 Melting point,℃:137-142 Ash, %: ≤0.1 Loss on Drying, %: ≤0.5 Transmittance, %:   460nm≥93%      500nm≥96%                                                                    UV ABSORBER HOSORB-326 has a wide range of indirect food approvals in polyolefin. It has a low volatility at high temperatures and high resistance to thermal degradation and can therefore be used without significant loss or decomposition in the polyolefin compounding and molding processes. It is especially suited for polyolefins and cold cured polyesters. It protects polymers from UV radiation helping to preserve the original appearance and physical integrity, especially for polyolefins and polyester resins.  info at hhochem. com