Sodium Metasilicate Pentahydrate
Sodium metasilicate is the chemical substance with formula Na2SiO3, It is an ionic compound consisting of sodium cations Na+ and the polymeric metasilicate anions [SiO23–]n. It is a colorless crystalline hygroscopic and deliquescent solid, soluble in water (giving an alkaline solution) but not in alcohols.
As a builder in soap and detergent
As anti corrosion agent
As clay deflocculant