Pentafluoro reversed-phase column for unique selectivity. The PRP-h5 utilizes the PRP-3 as its base with a pentafluorinated modification, making it more hydrophobic in nature. The PRP-h5, with its functionality derived from a pentafluorinated polymer bead, delivers a selectivity difference from standard silica C18 stationary phases. This gives chromatographers the desired retention characteristics necessary for certain sample types.