Disclosed is a process for the manufacture of 2,3,3,3-tetrafluoropropene comprising: (a) dehydrofluorinating 1,1,1,2,3-pentafluoropropane in the presence of a dehydrofluorination catalyst comprised of chromium (III) oxide, and alkali metal, to produce a product mixture comprising 2,3,3,3-tetrafluoropropene and less than 20 parts per hundred 1,3,3,3-tetrafluoro-1-propene; and (b) recovering said 2,3,3,3-tetrafluoropropene from the product mixture produced in (a).