Chemical name: 2-(2'-Hydroxy-5'-methylphenyl)benzotriazole Molecular formula:C13H11N3O Molecular weight: 225.3 CAS NO. : 2440-22-4 Chemical structural formula: Appearance:white to light yellow crystal powder Content: ≥ 99% Melting point: 128-130 °C Loss on drying: ≤ 0.5% Ash: ≤ 0.1% Light transmittance:   Wave length nm Light transmittance % 440 ≥ 97 500 ≥ 98   Toxicity: low toxicity,rattus norvegicus oral LD50 >5g/Kg weight. Use: This product is suitable in polyester, epoxy cellulose acetate, Polyvinyl chloride, organic glass and others. Max absorption wave length range is 270-380nm . General dosage:thin products: 0.1-0.5% , thick products: 0.05-0.2% . Solubility: 25°C unit:g/100mLsolvent Solvent Solubility Solvent Solubility Acetone 2.5 Dioctyl phthalate 2.5 Alcohol 0.3 Di-n-octyl sebacate 2.4 Methyl alcohol 0.2 A Ethanol 3.9 2-(2-Ethoxyethoxy)ethanol 2.6 Methyl methacrylate 5.0 Ethyl acetate 3.5 Styrene 7.2 n-Butyl acetate 3.0 Tricresyl phosphate 3.3 Benzene 6.9 Solvent gas 0.9 Toluene 6.0 Petroleum solvent 1.5 Cyclohexane 0.7 ** 0