high purity,low metal impurity for pharma use LufenuronIUPAC:1-[2,5-Dichloro-4-(1,1,2,3,3,3-hexafluoropropoxy)phenyl]-3-(2,6-difluorobenzoyl)ureaSynonym:fluphenacurSpecification:Appearance white powder Moisture 0.50% max Melting point164.7~167.7 oC Inorganic salts0.6% max Insobles in acetone 0.3% max heavy metal and Ferrous 20 ppm max Unknown single impurity≤ 0.5% Assay(HPLC)No less than 99.0% ...