UV absorber UV-O

　　Alias: 2,4-dihydroxybenzophenone

　　Appearance: light-colored needle crystal or white powder.

　　Moisture: <0.5%. Ash content <0.5%.

　　Melting point: 136～149℃.

　　Soluble in acetone, methanol, ethanol, methyl ethyl ketone, dioxane, N-methyl pyridone and ethyl acetate, very insoluble in water, n-heptane and benzene. The solubility of this product in some solvents (g/100ml solvent, 25℃) acetone 50, benzene 1, ethanol>50, water<0.5, n-heptane<0.5.

　　Product usage and precautions

　　This product is an ultraviolet absorber, suitable for polyvinyl chloride, polystyrene, epoxy resin, cellulose resin, unsaturated polyester, paint and synthetic rubber. The maximum absorption wavelength range is 280～340nm, and the general dosage is 0.1%1%. But the light stabilization effect of this product is not outstanding.

　　Safety precautions The oral LD50 of this product is 8.6g/kg body weight in mice and LD502.336mg/kg body weight in mice. At the doses of 0.19, 0.60, and 1.90 g/kg, no toxic effects were seen. The development of the other two groups of experimental animals had an effect, and the blood phase changed.