... name: LurfenuronChemical name (IUPAC):(RS)-1-[2,5-dichloro-4-(1,1,2,3,3,3-hexafluoropropoxy) phenyl]-3 ... difluorobenzoyl)urea Chemical Abstracts name N-[[[2,5-dichloro-4-(1,1,2,3,3,3-hexafluoropropoxy)phenyl] ... .f. C17H8Cl2F8N2O3 Form Colourless crystals. M.p. 168.7-169.4 °C (OECD 102) V.p. <4 ´ 10-3 mPa (25 ºC ... ). Non-sensitising to skin (guinea pigs). Inhalation LC50 (4 h, 20 ºC) for rats >2.35 mg/l ...