Thin layer chromatography silica gel is a white powder, divided into ordinary and efficient two categories. The main component is SiO2·nH2O, insoluble in water, inorganic acid and other organic solvents, soluble in HF and concentrated caustic soda solution. It absorbs moisture in the air. Because of the difference in adsorption and retention time of different substances, various substances can be separated and purified. Type H does not contain gypsum and organic adhesives; HF254 contains inorganic phosphors and appears yellow-green fluorescence at UV wavelength 254nm. Type G contains about 13% gypsum as a binder, slightly acidic; Type GF254 contains semi-aqueous gypsum and inorganic phosphors and displays yellow-green fluorescence at the UV wavelength of 254nm.

The product can be directly used for qualitative or quantitative analysis of many types of organic materials, and has been widely used in the identification of trace impurities and main components of medicine, pesticides, Chinese herbal medicine, organic chemical products, food and food. Among them, the high efficiency thin layer chromatography silica gel has the characteristics of uniform and fine particles, and the separation effect of substances is better than that of ordinary thin layer chromatography silica gel.