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Tinuvin® 571

Technical Datasheet | Supplied by BASF
HSP Distance with 5328: 0.3
Tinuvin® 571 by BASF is a liquid benzotriazole UV absorber. Imparts good light stability to a variety of polymers. Features high compatibility in various substrates, low volatility even at elevated temperatures, and high absorption and protection efficiency. Highly soluble in many solvents, monomers, or intermediates and easily emulsifiable in water-based adhesives. It can be considered for use during polymerization as well as for topical applications on PVC sheets Suitable for thermoplastic PUR, coating and integral foams, rigid and plasticized PVC, PVB, PMMA, PVDC, EVOH, EVA, hot cured unsaturated polyesters and spin finishes for PA, PET, PUR, and PP fibers. Also suitable for styrene homo- and copolymers, elastomers and polyolefins. Use levels of Tinuvin® 571 ranges between 0.2% and 5.0%, depending on substrate and performance requirements of the final application.
Product Type
Light Stabilizers / UV Absorbers > Benzotriazoles
Chemical Composition
CAS Number
Physical Form
Yellow, Clear viscous
Product Status
Applications/ Recommended for
  • PVC > PVC, flexible
  • PP
  • PVC > PVC, rigid
  • UPR
  • TPE and TPV > TPU (or TPE-U)
  • Other Thermoplastic > EVOH
  • Other Thermoplastic > EVA
  • PA, Nylon
  • PMMA
  • PET
  • Fibers/ Textiles/ Carpets > Fibers
  • Polymerization
  • Polymer protection > Weatherability (UV, moisture, Oxygen...)
Food contact approval

Tinuvin® 571 Properties


Value & Unit
Test Condition
Test Method
Molecular Weight
394 g/mol
Melting Point
-56 °C
Specific Gravity
1 g/ml
(At 20°C)
SpecialChem additionnal informations based on CAS Number : 125304-04-3

Hansen Solubility Parameters

[18.3, 4.1, 3.6]
[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® 571. A practical determination of these HSP values would provide higher certainty. Learn More.

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