Chemical name : 2- (2'-Hydroxy-5'-tert-octylphenyl)benzotriazole 
 

Formula : C₂₀H₂₅N₃O

Molecular Weight : 323
 

CAS NO : 3147-75-9

Specification:

Appearance : white powder

Assay: 99%Min

Melting Range : 103-105 °C

Transmittance:  @440nm≥ 97 %；@500nm≥ 98%

Ash: 0.1%Max

Loss on drying: 0.5%Max

Introduction : UV-329 is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers. UV-329 is an effective light stabilizer for a variety of plastics and other organic substrates.

Solubility At 20 °C (g/100ml solvent)

Applications

1. Unsaturated Polyester : 0.2-0.5wt% based on polymer weight.

2.PVC:Rigid PVC : 0.2-0.5wt% based on polymer weightPlasticized 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: 20kg PE bag, 25kg paper carton or drum.