... : LurfenuronChemical name (IUPAC):(RS)-1-[2,5-dichloro-4-(1,1,2,3,3,3-hexafluoropropoxy) phenyl]-3 ... )urea Chemical Abstracts name N-[[[2,5-dichloro-4-(1,1,2,3,3,3-hexafluoropropoxy)phenyl] ... (rabbits). Non-sensitising to skin (guinea pigs). Inhalation LC50 (4 h, 20 ºC) for rats >2.35 mg/l air ... and mallard ducks >5200 mg/kg. Fish LC50 (96 h) for rainbow trout >73, carp >63, bluegill sunfish ...