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.
Dual-Peak Protection - 306nm/347nm absorption with >99% UV blocking efficiency
Processing Stability - Withstands high-temperature molding up to 260°C
Material Integrity - <2% haze maintains original polymer appearance
Synergistic Performance - 50% enhanced anti-aging with HALS stabilizers
Regulatory Compliance - Meets strict food contact and environmental standards
Automotive Components - UV protection for lighting systems and exterior parts
Building Materials - Weather resistance for architectural panels and profiles
Food Packaging - Clear UV stabilization for containers and bottles
Outdoor Furniture - Color stability for wood coatings
Industrial Films - Long-term durability for technical polymer films
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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