CAS No. [3147-75-9]
Chemical name: 2-(2’-Hydroxy-5’-tert-octylphenyl) benzotriazole
Molecular formula: C₂₀H₂₅N₃O
Molecular weight: 323
Specification:
      Appearance: light yellow powder
      Assay: 99% min.
      Melting point: 101.0 - 106.0 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, plexiglass, polycarbonate, ABS resin etc. 

Molecular structure: