NUCLEODUR is a fully synthetical type B silica (silica of 3rd generation) offering highly advanced physical properties: Totally spherical particle shape Outstanding surface microstructure High pressure stability Low metal content NUCLEODUR as a state-of-the-art silica is the ideal base material for modern HPLC phases. It is the result of MACHEREY-NAGEL's pioneering research in chromatography for almost 50 years. NUCLEODUR SiOH (unmodified) Totally spherical high purity silica phase for HPLC · USP L3 Properties / Key features: Suitable for analytical and preparative separation of polar and midpolar compounds Technical characteristics Unmodified high purity silica; pore size 110 Å, particle sizes 3 to 50 m Pore volume 0.9 mL/g, surface area (BET) 340 m2/g pH stability 2-;8; metal content 10ppm Recommended application polar and midpolar compounds under normal phase conditions