Features : Nonpolar, endcapped phases for RP chromatography, Available pore sizes 50, 100, 120, 300, 500 and 1000A, Available particle sizes 3um, 5um, 7um and 10um. pH stability at 20°C: 2–8, carbon content depending on pore size (see table below). Separation mechanism based on hydrophobic (van der Waals) interactions, slight residual silanol interactions. Corresponding NUCLEODUR® phases: see Nucleodur C18 ec for numerous applications Standard Nucleosil C18 phases are available as packed EC columns for analytical HPLC.