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, degree:128-132
Assay (HPLC), %: 99 min.
Ash, %: 0.1 max.
Volatility, %: 0.5 max.
Light transmittance, %: 440nm 94% min.     
500nm 97% min.

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.