CAS No. [25973-55-1]
Chemical name: 2-(2’-Hydroxy-3’,5’-di-tert-pentylphenyl)benzotriazole
Molecular formula: C₂₂H₂₉N₃O
Molecular weight: 351.5
Specification:
      Appearance: light yellow powder
      Assay: 99% min.
      Melting point: 80-88 deg C
      Loss on drying: 0.5% max.
      Ash: 0.1% max.
      Transmittance:
            at 460nm:  97% min.
           at 500nm:  98% min.
Packing: 20/25kg fibre drum
Usage:
      As the ultraviolet absorption agent, it is available to polyolefine, polystyrene, PVC, polyurethane, polyester etc.

Molecular structure: