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

Rianox RIANOX UV-327 Benzotriazole UV Absorber

Rianox RIANOX UV-327 is a high-performance benzotriazole-type UV absorber from Rianox’s specialty additives portfolio, offering exceptional photostability and thermal resistance for polymers, coatings, and adhesives. It effectively absorbs UV radiation (290–400 nm), preventing degradation and yellowing while maintaining clarity and mechanical integrity in demanding applications.
  • rianox rianox uv 327 benzotriazole uv absorber_1490e4b0
  • rianox rianox uv 327 benzotriazole uv absorber_1490e4b0

Features Of Rianox RIANOX UV-327 Benzotriazole UV Absorber

  1. Highly effective UV absorber based on benzotriazole chemistry, offering broad-spectrum protection against UVA and UVB radiation.

  2. Excellent thermal and light stability, maintaining performance during high-temperature processing such as extrusion and injection molding.

  3. Low volatility and minimal migration, ensuring long-term UV resistance in polymer matrices without surface blooming.

  4. Good compatibility with a wide range of thermoplastics, thermosets, and coatings including polyolefins, PVC, ABS, and polyesters.

  5. Non-discoloring and chemically inert under normal use conditions, preserving substrate clarity and color fidelity.

Typical Applications Of Rianox RIANOX UV-327 Benzotriazole UV Absorber

  1. Automotive interior plastics (dashboards, trim, upholstery) requiring long-term weatherability.

  2. Outdoor construction materials including PVC window profiles, roofing membranes, and cladding panels.

  3. Engineering plastics for consumer electronics housings exposed to indoor and ambient sunlight.

  4. Coatings and inks for signage, packaging, and industrial labeling demanding UV-induced fade resistance.

  5. Transparent polycarbonate and acrylic glazing used in architectural and transportation applications.

Specifications Of Rianox RIANOX UV-327 Benzotriazole UV Absorber

Chemical TypeBenzotriazole derivative (2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol)
Product FormFree-flowing off-white to light yellow crystalline powder
AppearanceCrystalline solid, free from visible impurities
Molecular WeightApprox. 452.6 g/mol
Melting Point125–130 °C
SolubilitySoluble in common organic solvents (e.g., chloroform, THF, toluene); low solubility in water
Primary ApplicationsPolymer stabilization, protective coatings, inks, and adhesives
Key FeaturesUV absorption peak at ~340 nm; high molar extinction coefficient


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