1,3-Bis(trifluoromethyl)benzene is an organofluorine compound with the formula C6H4(CF3)2. It is the most intensively studied of three isomers of the same formula. Like benzotrifluoride, bis(trifluoromethyl)benzene is prepared by the reaction of hydrogen fluoride with the corresponding trichloromethylbenzene compound:C6H4(CCl3)2 + 6 HF → C6H4(CF3)2 + 6 HCl