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

BASF Tinuvin 328 Benzotriazole UV Absorber

BASF Tinuvin 328 is a premium benzotriazole UV absorber engineered for demanding polymer applications. This advanced stabilizer delivers dual-peak UV protection while maintaining optical clarity, extending material lifespan by 3-5 times in harsh outdoor environments. Ideal for automotive and construction applications requiring long-term durability.

Features Of BASF Tinuvin 328 Benzotriazole UV Absorber

  1. Dual-Peak Protection - 306nm/347nm absorption with >99% UV blocking efficiency

  2. Processing Stability - Withstands high-temperature molding up to 260°C

  3. Material Integrity - <2% haze maintains original polymer appearance

  4. Synergistic Performance - 50% enhanced anti-aging with HALS stabilizers

  5. Regulatory Compliance - Meets strict food contact and environmental standards

Typical Applications Of BASF Tinuvin 328 Benzotriazole UV Absorber

  1. Automotive Components - UV protection for lighting systems and exterior parts

  2. Building Materials - Weather resistance for architectural panels and profiles

  3. Food Packaging - Clear UV stabilization for containers and bottles

  4. Outdoor Furniture - Color stability for wood coatings

  5. Industrial Films - Long-term durability for technical polymer films

Specifications Of BASF Tinuvin 328 Benzotriazole UV Absorber

Chemical Name
2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol
CAS Number
25973-55-1
Molecular Weight
351.5 g/mol
Appearance
Pale Yellow Powder or Pellets
Melting Point
80-88°C
Flash Point
229°C
Density (20°C)
1.17 g/cm³
Vapor Pressure (20°C)
4.7×10⁻⁶ Pa
UV Absorption Peaks
306 nm / 347 nm
Molar Extinction Coefficient (347 nm)
14,760 L/mol·cm
Solubility (20°C)
Chloroform:44% / Dichloromethane:56% / Toluene:39%
Thermal Stability (TGA)
1% wt loss@183°C / 5% wt loss@223°C
Volatiles (150°C/3h)
≤0.5%
Recommended Dosage
0.1-1.0% (on substrate weight)
Moisture Content
≤0.1%
Packaging
20 kg/bag (moisture-proof foil)


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