water glass, also called sodium silicate or soluble glasssoluble glassSodium silicates are colorless glassy or crystalline solids, or white powders. Except for the most silicon-rich ones, they are readily soluble in water, producing alkaline solutions. Sodium silicates are stable in neutral and alkaline solutions.
› wiki › Sodium_silicateSodium silicate - Wikipedia, a compound containing sodium oxide (Na2O) and silica (silicon dioxide, SiO2) that forms a glassy solid with the very useful property of being soluble in water. Water glass is sold as solid lumps or powders or as a clear, syrupy liquid.