Based on the ever increasing demand on HPLC-, and UHPLC-columns, Kromasil Eternity is developed on a new generation of porous Kromasil silica, 2.5 and 5.0 µm. This analytical platform has an organic/inorganic interfacial gradient covering the silica, ensuring long life time for the column. Subsequent functionalization and endcapping of the organo-silica particle is performed using well known chlorosilane based chemistry, providing a material suited for most demanding separations. The first product based on the Eternity platform is Kromasil Eternity C18.