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Chemical name : 2-Hydroxy-4-n-octoxybenzophenone
Introduction : UV- 531 is an ultraviolet light absorber (UVA) of the benzophenone class, imparting good light stability for plastics and other organic polymers. Due to its highly effective broad UV absorption properties and excellent polymer compatibility, UV- 531 offers maximum polymer protection and low color contribution, retards yellowing and loss of physical properties.
CAS NO : 1843-05-6
Empirical Formula : C21H26O3
Structure :
Physical Properties
Molecular Weight : 326
Appearance : light yellow powder
Melting Range : 47-49 °C
Assay : 99% Min.
Volatile Matter : < 0.5% Max.
Specific Gravity(20 °C) : 1.16g/cm3
Transmissirity:
450nm≥ 95 %
500nm≥ 97%
Solubility At 20 ℃ (g/100ml solvent)
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Solvent
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Solubility
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Acetone
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43%
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Benzene
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72%
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Chloroform
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61%
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Ethanol
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3.5%
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Ethyl Acetate
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44%
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n-Hexane
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12%
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Methanol
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1.7%
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MEK
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65%
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Methylene Chloride
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67%
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Toluene
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>50%
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Water
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<0.01%
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Applications
1.Polypropylene : 0.2-0.5wt% based on polymer weight
2.PVC:
Rigid PVC : 0.5wt% based on polymer weight
Plasticized PVC : 0.5-2 wt% based on polymer weight
3.Polyethylene : 0.2-0.5wt% based on polymer weight
Packing: 25kg paper drum or carton
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