... Na2SiO3Molecular Weight 122.4UN NO. 3253the details of the goods:Sodium Oxide (Na2O): 49.50-51.50 % Silica (SiO2): 45.00 ... environmental pollution, preventing corrosion for metal (zinc, aluminum, etc. ). Therefore, sodium metasilicate pentahydrate is widely used for the manufacture of a variety ... agent, water retention agent, etc. Used in water reducing agents, Sodium metasilicate Anhydrous