FREEZING POINT at atmospheric pressure (°F)Freon-11 or R-11Trichloro-fluoro methane-168Freon-12 or R-12Dichloro-difluoro methane-252Freon-22 or R-22Difluoro-mono chloromethane-256R-717Ammonia-107.9Freon 22 has the LOWEST freezing point temperature from all of the above refrigerant.