UV Absorber UV-328

Short Description:

UV-328 is suitable for polyolefin (especially PVC), polyester, styrene, polyamide, polycarbonate and other polymers.

Product Detail

Product Tags

Chemical Name: 2-(2′-Hydroxy-3′,5′-dipentylphenyl)benzotriazole
CAS NO.:25973-55-1
Molecular Formula:C22H29N3O
Molecular Weight:351.48516


Appearance: white to light yellow powder
Content: ≥ 99%
Melting point: 80-83°C
Loss on drying: ≤ 0.5%
Ash: ≤ 0.1%
Light transmittance :440nm≥96%, 500nm≥97%


This product is mainly used in polyvinyl chloride, polyurethane, polyester resin and others. Max absorption wave length range is 345nm.
Toxicity: low toxicity and used in food packing materials.


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

Package and Storage

1. 25kg carton
2. Stored in sealed, dry and dark conditions

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