MoDTP Cas No.:72030-25-2 Sodium silicate is undoubtedly an inorganic compound known as water glass, Along with the chemical formula Na2SiO3. It's a colorless, a bit alkaline viscous liquid, weakly alkaline, soluble in drinking water, and might manufacture silica gel, silica black, silica sol, silicate cement, textiles, fireproofing brokers, etc.