Freon is prepared by the action of antimony fluoride on carbon tetrachloride in presence of antimony pentafloride as a catalyst
3CCL4+2SbF3SbCl5−−−→2SbCl3+3CCL2F2
Properties: Freon is a non-toxxic, non corrosive, non inflammable highly stable, easity liquefiable volatle liqui.