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Tinuvin® 326

Technical Datasheet | Supplied by BASF
Tinuvin® 326 by BASF is chemically phenol, 2-(5-chloro-2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methyl. It acts as a UV absorber belonging to hydroxyphenyl benzotriazole class which imparts good light stability to a variety of polymers. Especially suited for polyolefins. It has a wide range of indirect food approvals in polyolefins. Tinuvin® 326 possesses low volatility and high resistance to thermal degradation making it particularly useful in polyolefin compounding and molding processes. Recommended concentrations are 0.1%-0.5% for polypropylene and 0.1%-0.4% for polyethylene.
Product Type
Light Stabilizers / UV Absorbers > Benzotriazoles
Chemical Composition
Phenol, 2-(5-chloro-2H-benzotriazole-2-yl)-6-(1,1-di-methylethyl)4-methyl
CAS Number
Physical Form
Product Status
Applications/ Recommended for
  • Compoundings
  • Mechanical/ physical performance > Thermal resistance
  • Polymer protection > Weatherability (UV, moisture, Oxygen...)
  • Safety, regulation & environment > Low volatiles
Food contact approval

Tinuvin® 326 Properties


Value & Unit
Test Condition
Test Method
Molecular Weight
316 g/mol
Melting Point
138 - 141 °C
Flash Point
238 °C
DIN 51584

SpecialChem additionnal informations based on CAS Number : 3896-11-5

Hansen Solubility Parameters

[19.3, 5.3, 5.5]
[δD - Dispersion force interactions, δP - Polar force interactions, δH - Hydrogen bond force interactions]

Please note, these HSP values are estimations. It is based upon the “like seeks like” principle. It splits an ingredients interactions into three parameters; δD (Dispersion force interactions), δP (Polar forces interactions) and δH (Hydrogen bond force interactions). Hansen Solubility Parameters can help you find a wide range of products that are predicted to be compatible with Tinuvin® 326. A practical determination of these HSP values would provide higher certainty. Learn More.

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