Qingdao Column Chromatography Silica Gel 100-200 mesh, 200-300 mesh, 300-400 mesh silica gel powder, Column chromatography silica gel is processed and manufactured using coarse-pore silica gel as the raw material. The main characteristic of column chromatography silica gel is its ability to separate and purify by leveraging the differences in adsorption retention times of various components in a mixture. It features high purity, safety, and hygiene. Column chromatography silica gel is used for the separation and purification of active ingredients in Chinese herbal medicine, the preparation of high-purity substances, the refining of petroleum products, and the dehydration and purification of organic substances.