CAS No. [3896-11-5]
Chemical name: 2-（2’-Hydroxy-3’-tert-butyl-5’-methylphenyl）-5-chlorobenzortriazole
Molecular formula: C₁₇H₁₈N₃OCl
Molecular weight: 315.8
Specification:
      Appearance: light yellow powder
      Assay: 99% min.
      Melting point: 137.0-141.0 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 polyolefin, polyvinyl chloride as well as plexiglass and ABS resin etc. The maximum absorbing wavelength range is 270-380nm. 

Molecular structure: