Chemical name:2-(2'-Hydroxy-3',5'-di-tert-pentylphenyl)-benzotriazole Molecular formula:C22H29N3O Structural formula: Properties: Properties and application:It is a pale yellowish powder melting point 81, soluble in benzene, toluene, ethyl acetate and petroleum ether, slightly soluble in ethyl alcohol and methyl alcohol insoluble in **. It is a excellent ultraviolet absorbet, UV max:345nm, solubility for polymer is good, volatility is little, mainly used for PE, PP,PS,PVC, poly ester and ABS resins, and so on. Specifications: Appearance Light yellow powder Melting point ≥81 Volatile matter ≤0.5% Ash content ≤0.05% Transmissirity 460nm≥97% 500nm≥98% Purity ≥99%