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Tinuvin® 571

Technical Datasheet | Supplied by BASF
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
  • Other Thermoplastic > EVA
  • Other Thermoplastic > EVOH
  • PA, Nylon
  • PET
  • PMMA
  • PP
  • PVC > PVC, flexible
  • PVC > PVC, rigid
  • TPE and TPV > TPU (or TPE-U)
  • UPR
  • 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)

Compatiblity with other products

Find products that are predicted to be compatible with Tinuvin® 571.

This list of compatible products is generated out of estimated HSP values. A practical determination of these HSP values would provide higher certainty.
Learn more about Hansen Solubility Parameters (HSP) and their use in predictive formulation.

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