Light stabilizer UV-571
CAS Number
125304-04-3
EC Number
603-051-2
What is Light stabilizer UV-571?
Light Stabilizer UV-571 (CAS 125304-04-3), also marketed as Benzotriazolyl Dodecyl p-Cresol, is a benzotriazole-based UV absorber that protects organic materials from photodegradation caused by UV radiation.
Where is Light stabilizer UV-571 used?
- Polyolefins, PVC and engineering plastics: extends service life in agricultural films, automotive parts and construction profiles
- Coatings: industrial and automotive topcoats requiring gloss retention and colour stability
- Rubber: EPDM and other elastomers for weatherstripping, roofing membranes and outdoor sealing profiles
- Adhesives and sealants: limits UV-induced yellowing or embrittlement that would compromise bond integrity
- Its long dodecyl chain improves compatibility with non-polar substrates and reduces volatility during high-temperature processing.
Commercial specifications
- Purity typically 98% or higher
- Purity confirmed by HPLC
- Packaging: drums and IBC containers
Other Names (Synonyms)
2-(2h-benzothiazol-2-yl)-6-(dodecyl)-4-methylphenol|Phenol, 2-(2h-benzotriazol-2-yl)-6-dodecyl-4-methyl-, branched and linear|Benzotriazolyl dodecyl p-cresol|2-(2h-benzotriazol-2-yl)-6-dodecyl-4-methylphenol
What are the physical properties of Light stabilizer UV-571?
Melting Point >350 °C(lit.)
Boiling Point 414°C[at 101 325 Pa]
Density 0.911 g/mL at 25 °C(lit.)
Flash Point >230 °F
Water Solubility 130ng/L at 20℃
Vapor Pressure 0Pa at 25℃
Refractive Index n 20/D 1.574(lit.)
Log P 8.9 at 25℃
Which trade and regulatory codes apply to Light stabilizer UV-571?
UN Number 3082
ADR Class 9
Packing Group III
Storage Class 10 - Combustible liquids
WGK (Germany) 2