Beer silica gel is an amorphous structure of the solid powder, pore size 8 ~ 16nm, chemical formula is mSiO2, nH2O, insoluble in Beer silica gel is an amorphous structure of the solid powder, pore size 8 ~ 16nm, chemical formula is mSiO2, nH2O, insoluble in water and any other solvent. It can not react with any acid, alkali, salt except caustic soda and hydrofluoric acid. It harmless to human ...