Nexera UC Naphthyl, 3 Micron, 4.6 x 100 mm The Nexera UC Naphthyl column is a naphthalene based SFC material, with high bonding density and intrinsic base deactivation due to a rigid structure that also enables the shape selectivity needed for many diastereomeric separations. Nexera UC naphthyl columns exhibit strong pi-pi interactions and charge transfer properties and perform well for diastereomer separations as well as non-polar compounds. Selectivity of this column is between graphitized carbon and alkyl- type stationary phases.