The present invention relates to processes for reducing the concentration of acidic impurities HF, HCl, HBr, HI, HNO.sub.3 and H.sub.2SO.sub.4 in fluorinated hydrocarbons. The process involves: (i) contacting the fluorinated hydrocarbon with a phosphorous oxyacid salt, and (ii) recovering the fluorinated hydrocarbon having reduced concentration of, or substantially free of, said acidic contaminant, provided that said fluorinated hydrocarbon is not CF.sub.3CH.sub.2CF.sub.3 or CF.sub.3CHFCF.sub.3.