UV absorber UV-9

　　Alias: 2-hydroxy-4-methoxybenzophenone

　　Appearance: light yellow or white crystalline powder.

　　Density: 1.324g/cm3 (2℃5).

　　Melting point: 62～66℃.

　　Boiling point: 150～160℃(0.67kPa), 220℃(2.4kPa).

　　It is soluble in most organic solvents such as acetone, ketone, benzene, methanol, ethyl acetate, methyl ethyl ketone and ethanol, but insoluble in water.

　　The solubility of this product in some solvents (g/100g solvent, 25), in the solvent benzene 56.2, n-hexane 4.3, ethanol (95%) 5.8, carbon tetrachloride 34.5, styrene 51.2, DOP18.7.

　　Product usage and precautions

　　This product is an ultraviolet absorber, suitable for various plastics such as polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, unsaturated polyester, ABS resin and cellulose resin. The maximum absorption wavelength range is 28.340nm , The general dosage is 0.1% ~ 1.5%, good thermal stability, decomposition at 200 ℃. This product hardly absorbs visible light, so it is suitable for light-colored transparent products. This product can also be used in paint and synthetic rubber.

　　Safety precautions Japan and Italy stipulate that when this product is used in food-contact products, the maximum dosage should not exceed 0.3%.