Silica gel powder, 100-300 mesh, coarse pore column chromatography silica gel.

Column chromatography silica gel is a white powder, primarily composed of SiO₂·nH₂O. It is insoluble in water, inorganic acids, and other organic solvents but soluble in hydrofluoric acid and concentrated caustic alkali solutions. It can absorb moisture from the air. Due to its differential adsorption and retention times for various substances, it enables the separation and purification of different materials.

This product is mainly used for refining petroleum products by removing aromatic hydrocarbons, selective adsorption and separation of organic gases and liquids, serving as a catalyst carrier and chromatographic support, as well as for the separation and purification of active ingredients in Chinese herbal medicine and the preparation of high-purity substances.