Sodium metasilicate

Sodium metasilicate is the chemical substance with formula Na₂SiO
₃, which is the main component of commercial sodium silicate solutions. It is an ionic compound consisting of sodium cations Na⁺ and the polymeric metasilicate anions [–SiO²⁻₃–]_n. It is a colorless crystalline hygroscopic and deliquescent solid, soluble in water (giving an alkaline solution), but not in alcohols.

Uses

Sodium Metasilicate reacts with acids to produce silica gel.

• Cements and Binders - dehydrated sodium metasilicate forms cement or binding agent.
• Pulp and Paper - sizing agent and buffer/stabilizing agent when mixed with hydrogen peroxide.
• Soaps and Detergents - as an emulsifying and suspension agent.
• Automotive applications - decommissioning of old engines (CARS program), cooling system sealant, exhaust repair.
• Egg Preservative - seals eggs increasing shelf life.
• Crafts - forms "stalagmites" by reacting with and precipitating metal ions.