Ultraviolet absorber UV-328

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Ultraviolet absorber UV-328
Posting date : Dec 04, 2012
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29-
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Chemical Name: 2-(2`-Hydroxy-3`,5`-dipentylphenyl) benzotriazole CAS No: 21615-49-6 Molecular Formula: C22H29N3O Appearance: White to light yellow powder Assay: ≥99% Melting point: 80 -83ºC Loss on drying: ≤0.5% Ash: ≤0.1% Light Transmittance: 440 nm≥97%,500nm≥98%. Use: As the ultraviolet absorption agent, it is available to polyolefine, polystyrene, PVC, polyurethane, polyester etc. It is excellent in benzotriazole kind of uv-absorber. The max. absorbing wavelength is 345nm.The general consumption is about 1%. Note: Toxicity is low. FDA(USA)has permitted it to be used as the foodstuff packing material

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