The Shodex Asahipak C4P-50 5µm 250Å series are columns for reversed phase chromatography and packed with Polyhydroxymethacrylate spherical porous particles that have C4 (Butyl) bonded to the surface. These columns are compatible with not only water (H2O) or polar organic solvents, but also the wide pH range between 2 to 13.