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

BASF Tinuvin 928 Hydroxyphenylbenzotriazole UV Absorber

BASF Tinuvin 928 is a premium benzotriazole UV absorber engineered for demanding high-temperature coating applications. This advanced stabilizer delivers exceptional UV protection with dual-peak absorption, significantly extending coating durability while maintaining optical clarity in automotive and industrial systems exposed to extreme environmental conditions.

Features Of BASF Tinuvin 928 Hydroxyphenylbenzotriazole UV Absorber

  1. Dual-Peak Efficiency - Optimal UV absorption at 304nm and 346nm wavelengths

  2. Thermal Endurance - Maintains stability above 220°C processing temperatures

  3. Universal Compatibility - Excellent solubility in various resin systems

  4. Synergistic Performance - 80% enhanced durability with HALS stabilizers

  5. Environmental Safety - Low volatility and heavy metal-free formulation

Typical Applications Of BASF Tinuvin 928 Hydroxyphenylbenzotriazole UV Absorber

  1. Automotive Finishes - Long-term gloss retention for OEM and refinish coatings

  2. Industrial Protection - Weather resistance for pre-painted metal substrates

  3. Wood Preservation - Color stability for exterior wood varnishes

  4. Packaging Safety - Compliant UV protection for food-contact inks

  5. Renewable Energy - Durability enhancement for solar panel components

Specifications Of BASF Tinuvin 928 Hydroxyphenylbenzotriazole UV Absorber

Chemical Name
2-(2H-Benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol
CAS Number
73936-91-1
Molecular Weight
441.6 g/mol
Appearance
White to Pale Yellow Crystalline Powder/Pellets
Melting Point
109-113°C
Density (20°C)
1.07 g/cm³
Vapor Pressure (20°C)
<10⁻⁶ Pa
UV Absorption Peaks
304 nm / 346 nm
Molar Extinction Coefficient (346 nm)
15,500 L/mol·cm
Light Transmittance
440 nm≥97% / 500 nm≥98%
Solubility (20°C)
Xylene:>10 g/100g / Butyl Acetate:>30 g/100g / n-Hexane:>50 g/100g
Volatiles (150°C/3h)
≤0.3%
Ash Content
≤0.1%
Moisture Content
≤0.1%
Oral Toxicity (Rat LD₅₀)
>2000 mg/kg
Recommended Dosage
1.0-3.0% (on binder weight)
Packaging
20 kg/bag (moisture-proof foil)


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