... 2,6-difluorobenzoyl)ureaSynonym:fluphenacurSpecification:Appearance white powder Moisture 0.50% max Melting point164.7~167.7 oC ... 20 ppm max Unknown single impurity≤ 0.5% Assay(HPLC)No less than 99.0% Application: in the control medication, ... and the veterinary coformulation flea control, heartworm prevention, and anthelmitic medicine. lufenuron, 99% ...