What are the advantages of silica gel desiccant?

Silica gel is a highly active adsorption material, usually prepared 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 mSi02 .Nh2O. It is not soluble in water or any solvent, non-toxic, odorless, chemically stable, and does not react with any substances except strong alkali and hydrofluoric acid. Meet the Chinese chemical standard HG/T2765-2005. It is a desiccant approved by the FDA that can be directly contacted with food and drugs. Therefore, it can be in direct contact with any object.
　　The advantage of silica gel desiccant is a kind of physical adsorption desiccant, which relies on its internal capillary to absorb water vapor in the air, and firmly locks the water inside the knot, even if it is full of water, the appearance There will be no change, and the appearance still looks dry.
　　Summary:
　　1. Silica gel has the characteristics of non-deliquescent, non-corrosive and insoluble in water.
　　2. Silica gel is odorless, odorless and no threat to health.
　　3. Even after absorbing water, the silica gel still feels and looks dry.
　　4. Has stable quality.