Component : 2 - ( 2'- hydroxy -3 ' , 5'- di-t-butylphenyl) benzotriazole
Introduction : 
      UV-320 is a high-light stabilizer is widely used in plastics and other organic compounds, in which include unsaturated polyester, PVC, PVC plastics increased in the polyurethane, polyamide, synthetic fiber, especially a polyester, an epoxy resin applications, UV-320 a more prominent effect was , UV-320 has the ability to absorb ultraviolet light, low volatility of the features. It can effectively protect the polyester and organic pigments exempt ultraviolet radiation, thereby protecting the molded objects, films, etc. in the open state of the original physical appearance. 
Molecular formula : C 20 H 25 N 3 O

Molecular weight : 323.4 
CAS NO. : 3846-71-7