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UV-531

Equivalent: Chimassorb 81 , Cyasorb UV-531
Chemical name: 2-Hydroxy-4-Octyloxy Benzophenone
CAS NO.: 1843-05-6
Molecular formula: C21H26O3
Molecular weight: 326
Chemical structure
Specification  
Appearance : light yellow needle crystalline powder
Content (GC) : 99.0% min (gas chromatography)
Melting point : 47-49°C
Ash : 0.1% max
Transmittance :

450nm: 90%min
500nm: 95%min
Solubility :

( 25°C) ( g/100g solvent) Acetone: 74, Benzen: 72, Methanol: 2, Ethanol (95%): 2.6, N-heptane: 40, N-hexane: 40.1

Use
UV 531 is a kind of highly effective to resist to age. It can absorb ultraviolet in 240~340nm.It has many advantages, such as light color, nontoxic, good solubility, easy processing and so on. It protects polymers from UV radiation helping to preserve the original appearance and physical integrity. It can be widely used for PE, PVC, PP, PS, PC, organic glass, polypropylene fiber, ethylene-vinyl acetate, etc. UV 531 provide good light stability effect on dry phenol aldehyde, alkyd varnishes, polyamino esters, acrylic acids, epoxides, other air products, automobile-repairing paints, powder coatings,polyurethanes, rubble items, and so on. Its dosage is 0.1-0.5% based on polymer weight. UV 531 is approved to be used for food package in many countries. UV 531 is especially recommended in PE, PP, PVC, etc.

Package and Storage
Nontoxic, non-flammable, non-explosive, non-corrosive and good storage stability. Cardboard drum inner lining plastic bag, each drum 20kg or 25kg net weight. Or according to customers' equirements.