Waters, 186000109, Symmetry Shield RP18 Column, 100Å, 5 µm, 4.6 mm X 150 mm, 1/pk

Waters SymmetryShield RP18 is a 4.6 × 150 mm analytical HPLC column containing 5 µm, 100 Å silica-based C18 particles. An embedded polar group reduces interactions between basic analytes and residual silica silanols, supporting improved peak symmetry compared with conventional unshielded surfaces. The reversed-phase stationary phase is appropriate for analytical separations of pharmaceuticals and other organic molecules when peak tailing from basic compounds is a concern. Its 4.6 mm bore suits established analytical HPLC flow conditions and routine UV detection methods. Waters specifies a pH operating range of 2–8 and a maximum pressure of 415 bar. The product is supplied as one complete analytical column rather than an unfilled cartridge or guard column.