Wakogel® series is crushed silica gel with 7nm pore size. These silica gels can be used for purification processes such as preparative and/or column chromatography. Several products with different particle sizes are available. For example, Wakogel® C-200 (partile size 75-150μm) can be used for open chromatography and Wakogel® C-300 (45-75μm) can be used for flash chromatography. Furthermore, smaller particle sizes enable higher separation performance, for example using Wakogel® C-400 HG (20-40μm) and Wakogel® C-500 HG (15-30μm). As shown in here, the particle size uniformity of our each products has being higher than that of other competing products.