PVC Effective UV Absorber UV-326

Chemical name: 2-(2'-hydroxide-3'- tertiary butyl5'-methylphenyl)-5 -chloro-2H-benzotriazole 

Molecular formula: C₁₇H₁₈N₃OCL

Molecular weight: 315.5

CAS NO.: 3896-11-5

Chemical structural formula:



Appearance: light yellow small crystal
Content: ≥ 99%
Melting point: 138°C
Loss on drying: ≤ 0.5%
Ash: ≤ 0.1%
Light transmittance:
Toxicity: low toxicity,rattus norvegicus oral LD50 >5g/Kg weight.

Use:This product is suitable in Polyolefine, Polyvinyl chloride, organic glass and others. Max absorption wave length range is 270-380nm.

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