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

BASF Tinuvin 320 Hydroxyphenyl Benzotriazole UV Absorber

BASF Tinuvin 320 is a high-performance hydroxyphenyl benzotriazole UV absorber from the Tinuvin series, offering exceptional photostability and broad-spectrum UV-A/UV-B protection for polymers, coatings, and adhesives. It prevents yellowing and degradation while maintaining clarity and mechanical integrity under prolonged sunlight exposure.
  • basf tinuvin 320 hydroxyphenyl benzotriazole uv absorber_9d3c3288
  • basf tinuvin 320 hydroxyphenyl benzotriazole uv absorber_9d3c3288

Features Of BASF Tinuvin 320 Hydroxyphenyl Benzotriazole UV Absorber

  1. Highly effective UV absorption in the critical 300–400 nm range, providing superior photostabilization for organic substrates.

  2. Excellent thermal and hydrolytic stability, ensuring consistent performance during high-temperature processing (e.g., extrusion, injection molding).

  3. Low volatility and minimal migration, supporting long-term durability in demanding outdoor applications.

  4. Good compatibility with a broad range of polymers including polyolefins, styrenics, engineering plastics, and coatings.

  5. Non-discoloring performance—maintains substrate clarity and color fidelity over extended UV exposure.

Typical Applications Of BASF Tinuvin 320 Hydroxyphenyl Benzotriazole UV Absorber

  1. Polypropylene (PP) and polyethylene (PE) automotive interior parts exposed to sunlight.

  2. Exterior architectural coatings and industrial maintenance paints requiring weather resistance.

  3. Transparent polycarbonate (PC) glazing and lighting diffusers for outdoor use.

  4. Styrenic-based consumer goods such as housings, appliances, and garden furniture.

  5. Flexible and rigid PVC profiles for window systems and façade elements.

Specifications Of BASF Tinuvin 320 Hydroxyphenyl Benzotriazole UV Absorber

Chemical TypeHydroxyphenyl benzotriazole (HPBT)
Product FormFree-flowing off-white to light yellow crystalline powder
AppearanceCrystalline solid, free of visible impurities
Molecular Weight349.4 g/mol
Melting Point135–140 °C (determined by DSC)
Solubility (20 °C)Soluble in common organic solvents (e.g., toluene, xylene, THF); low solubility in water
UV Absorption Maximum (λmax)~342 nm (in ethanol)
Primary ApplicationsPlastics, coatings, adhesives, and elastomers requiring UV protection


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