Inertsil Ph-3 Cartridge Guard Column Ei (non-metal), 5 µm, 10 x 3.0 mm, 2/Pk

Just like InertSustain Phenyl, Inertsil Ph-3 has phenyl groups directly bonded to the silica gel which provides pure reverse phase characteristics that are critical to resolving highly polar compounds like acidic and basic pharmaceuticals. The near perfect phenyl phase coverage on this material results in symmetric, narrow peaks for even the most polar compounds while using simple eluents like aqueous acetonitrile or methanol.