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Ultraviolet Absorber 531 (UV-A)

Chemical Name: 2-Hydroxy-4-n-octoxybenzophenone

CAS NO.:1843-05-6 


UV Absorber 531 is a highly efficient ultraviolet absorber with low volatility, resistance to migration and easy processing properties. It has excellent synergistic effect with antioxidant and light stabilizer.


The product is mainly used for PE, PVC, PP, PS, PC, EVA, plexiglass and other materials. It has excellent solubility and compatibility with high solid coatings formulations. The product is suitable for automotive paint, powder coatings, polyurethane, rubber products. UV-531 is especially recommended in PE, PP, PVC etc.


AppearanceYellow powder
Purity %99.0 min
Light transmittance (440nm)84% min
Light transmittance (460nm)96% min
Light transmittance (500nm)97% min
Melting point ℃47-50
Loss on drying %0.2 max
Ash %0.1 max

Package: 25kg carton inner with plastic bag or as customer’s requirement.

Storage: Keep container tightly closed in a dry and well-ventilated place.