2,2'-Dihydroxy-4,4'-dimethoxybenzophenone [ 131-54-4 ]

Purity: 98%, flaxen crystallization. Melting point 139-140 ℃. Soluble in ethyl acetate, armour benyi methadone and toluene, insoluble in water. The goods for two benjia ketone uv absorber. Uv absorber is currently the most common use of light stabilizer, this is a kind of will strongly, selective absorption high-energy ultraviolet light, and energy conversion, as heat form or harmless low-energy radiation energy release or consumption of material. Contains a adjacent bits of hydroxyl groups two benjia methadone only absorb ultraviolet light 380nm below, hardly absorb light. The goods in 270-380nm wavelength range has very strong absorption, suitable for polyvinyl chloride, acrylic resin, epoxy resin, phenolic resin, nitric acid cellulose and polyurethane classes. But the goods can absorb part of visible light, the products with the yellow slightly. To observe the oral LD50 for 3000mg/kg.