2- (2'-Hydroxy-5'-tert-octylphenyl)benzotriazole ；Octrizole；Cyasorb 5411；UV-329
Introduction :

CAS NO : 3147-75-9
Empirical Formula : C₂₀H₂₅N₃0
Structure : 

Appreance: white powder
Melting Point:101-106°C
Assay:≥99.0%
Transmittance: 440 nm≥97%   500 nm≥98%
Package:25kg fibre drum or 25kg carton 

It is fine protective agent. It is widely used in PE, PVC, PP, PS, PC, polypropylene fibre, ABS resin, epoxy resin, resin fiber and ethylene vinyl acetate fields.