Silica gel desiccant is a highly active adsorption material, usually made by reacting sodium silicate and sulfuric acid, and after a series of post-treatment processes such as aging and acid foaming.Silica gel is an amorphous substance, and its chemical formula is mSiO2.nH2O.It is insoluble in water and any solvents, non-toxic, tasteless, chemically stable, and does not react with any substances except strong alkalis and hydrofluoric acid.The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to replace with other similar materials.Silica gel desiccant has high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength.Silica gel desiccant is a different kind of silica gel packed in moisture-permeable pouches. The main raw material silica gel is a high microporous structure of hydrated silica. It is non-toxic, odorless, odorless, chemically stable, and has strong moisture absorption properties. A highly active adsorption material.It is usually prepared by reacting sodium silicate with sulfuric acid and undergoing a series of post-treatment processes such as aging and acid foaming.Silica gel is an amorphous substance, its shape is transparent and irregular sphere, and its chemical formula is mSiO2·nH2O.Therefore, it is widely used to control the relative humidity of the environment in the storage and transportation of instruments, meters, equipment, leather, bags, shoes, textiles, food, medicines, etc., to reduce and slow down the moisture, mildew and rust of items.