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UV absorber UV-326 CAS NO.: 3896-11-5

Max absorption wave length range is 270-380nm.

It mainly used to polyvinyl chloride, polystyrene, unsaturated resin, polycarbonate, poly (methyl methacrylate), polyethylene, ABS resin, epoxy resin and cellulose resin etc.


  • Chemical name: 2-(2'-hydroxide-3'- tertiary butyl–5'-methylphenyl)-5 -chloro-2H-benzotriazole
  • Molecular formula: C17H18N3OCL
  • Molecular weight: 315.5
  • CAS NO.: 3896-11-5
  • Product Detail

    Product Tags

    Chemical name 2-(2′-hydroxide-3′- tertiary butyl–5′-methylphenyl)-5 -chloro-2H-benzotriazole
    Molecular formula C17H18N3OCL
    Molecular weight 315.5
    CAS NO. 3896-11-5 

    Chemical structural formula
    UV absorber UV-326

    Technical index

    Appearance light yellow small crystal
    Content ≥ 99%
    Melting point 137~141°C
    Loss on drying ≤ 0.5% 
    Ash ≤ 0.1% 
    Light transmittance 460nm≥97%; 500nm≥98% 

    Use
    Max absorption wave length range is 270-380nm.
    It mainly used to polyvinyl chloride, polystyrene, unsaturated resin, polycarbonate, poly (methyl methacrylate), polyethylene, ABS resin, epoxy resin and cellulose resin etc.

    General dosage
    1. Unsaturated Polyester: 0.2-0.5wt% based on polymer weight
    2. PVC
    Rigid PVC: 0.2-0.5wt% based on polymer weight
    Plasticized PVC: 0.1-0.3wt% based on polymer weight
    3. Polyurethane: 0.2-1.0wt% based on polymer weight
    4. Polyamide: 0.2-0.5wt% based on polymer weight

    Packing and Storage
    Package: 25KG/CARTON
    Storage: Stable in property, keep ventilation and away from water and high temperature.


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