Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

BASF Tinuvin 320 Benzotriazole UV Absorber

BASF Tinuvin 320 is a high-performance benzotriazole UV absorber specifically formulated for rigid PVC and unsaturated polyester applications. This advanced stabilizer delivers exceptional dual-peak UV protection while maintaining optical clarity, extending material service life by 3-5 times in demanding outdoor environments.

Features Of BASF Tinuvin 320 Benzotriazole UV Absorber

  1. Targeted UV Defense - 304nm/346nm dual-peak absorption with >99% blocking efficiency

  2. Material Stability - 60% lower volatility than standard benzotriazoles

  3. Processing Friendly - Excellent solubility in PVC and polyester systems

  4. Performance Booster - 70% enhanced weatherability with HALS synergists

  5. Regulatory Ready - Complies with strict food contact and environmental standards

Typical Applications Of BASF Tinuvin 320 Benzotriazole UV Absorber

  1. Construction Materials - Weatherproofing for PVC profiles and pipes

  2. Automotive Finishes - UV protection for polyester gel coats

  3. Industrial Protection - Durable coatings for machinery and equipment

  4. Technical Textiles - UV resistance for synthetic fibers

  5. Solar Components - Encapsulation protection for photovoltaic films

Specifications Of BASF Tinuvin 320 Benzotriazole UV Absorber

Chemical Composition
2-(2H-Benzotriazol-2-yl)-4,6-di-tert-butylphenol
CAS Number
3846-71-7
Molecular Weight
323.44
Appearance
White to Pale Yellow Crystalline Powder
Melting Point
137-141°C
Volatiles (150°C/3h)
≤0.5%
UV Absorption Peaks
304 nm / 346 nm
Molar Extinction Coefficient (346 nm)
14,520 L/mol·cm
Solubility (20°C)
Acetone:21% / Chloroform:24% / Dichloromethane:26%
Thermal Stability (TGA)
1% wt loss@178°C / 5% wt loss@203°C
Recommended Dosage
0.1-1.0% (on substrate weight)
Flash Point
>300°C
Density
1.22 g/cm³
Moisture Content
≤0.1%
Ash Content
≤0.01%
Packaging
20 kg/bag (aluminum foil moisture-pro


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