Waters, WAT010025, Nova-Pak Silica Column, 60Å, 4 µm, 3.9 mm X 150 mm, 1/pk

Nova-Pak Silica Column, 60Å, 4 µm, 3.9 mm X 150 mm, 1/pk is used for general-purpose normal-phase HPLC separations. The column is packed with spherical silica particles using 4 µm particle technology and a 60 Å pore size. Its unbonded silica chemistry has high silanol activity and is not endcapped, giving the surface characteristics required for normal-phase retention. The analytical format is 3.9 mm inner diameter × 150 mm, with a maximum pressure of 6000 psi (415 bar) and a usable pH range of 2–8. The 4 µm particle format is designed to deliver higher resolution, more efficient separations, and faster chromatography than comparable 5 µm formats. These properties make the column useful for normal-phase methods that rely on polar interactions with silica and need a compact analytical column with controlled particle size. The product carries USP L3 classification and is intended for HPLC systems. Its combination of bare silica chemistry, 4 µm particles, and standard analytical dimensions supports method development and routine separations where conventional bonded reversed-phase columns are not appropriate.