UV Absorber 327
UV Absorber 327

Item specifics

Light yellow powder

Product review


Product Description

Benzotriazole UV Absorber 327( UV 327) cas:3864-99-1

Chemical name 2-(2'-Hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole

molecular formulaC20H24ClN3O

Introduction :

UV327 is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers. 

UV327 is recommended in a variety of polymers and organic substrates, including acrylic polymers, polycarbonate, polyesters, styrene homo- and copolymers, unsaturated polyesters, polyvinyl chloride, polyolefins, polyvinyl butyral, elastomers, and adhesives.. 

Physical Properties:
Appearance: Light yellow crystalline powder
Content: > =99%
Melting Point: 154-158° C
Ash: < =0.1%
Loss on Drying: < =0.5%

Light Transmittance: 460nm≥97% ; 500nm≥98%

Flashpoint : 234 °C
Specific Gravity(20 °C) : 0.37g/cm3


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


This product may be stored for one year in a sealed container. Containers should be stored in a cool, dry area. Extended storage at elevated temperatures or exposure to direct heat or sunlight could reduce product life. Keep containers sealed when not in use.

Pale yellow crystal powder
99.0% min
Melting point
1540-158.0°C min
Loss on drying
0.5% max
0.1% max
Light Transmittance: 460nm
Light Transmittance: 500nm

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Packing details
UV-327 is available in powder form in a 25 kg carton or a 25kg fiber drum, net weight, with an inner PE liner.