UV Absorber UV-531 Description
UV Absorber UV-531 (CAS: 1843-05-6) is a kind of light-yellow powder. It has high compatibility, good thermal stability, and low volatility with polymers. UV-531 mainly absorbs 240 to 340nm. It can protect polymers from UV light and keep polymers physical and chemical properties.
UV Absorber UV-531 Chemical Structure

UV Absorber UV-531 Specification
CAS Number
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1843-05-6
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Chemical Formula
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C21H26O3
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Molecular Weight
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326.4
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Form
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light-yellow powder
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Purity
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≥99% (HPLC)
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Density (g/cm3)
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1.160
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Melting Point
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47 ~ 49℃
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Flash Point
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102℃
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Refractive Index
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1.600
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Transmittance
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460nm≥90%, 500nm≥95%
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Storage Condition
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Sealed in dry, Room Temperature, dark place
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UV Absorber UV-531 Applications
Ultraviolet absorber UV-531 is mainly used as a light stabilizer for polyethylene, polypropylene, polyvinyl chloride, polyurethane rubber, and other synthetic materials. UV-531 also provides a good light stability effect on acrylic acids, polyamine esters, automobile-repairing paints, rubble items, etc.
UV Absorber UV-531 Packaging
Our UV Absorber UV-531 is carefully handled during storage and transportation to preserve the quality of our product in its original condition.