
Sodium silicate (chemical formula: Na2SiO3), commonly known as pyrophorine, glass glue, is a colorless, transparent viscous solid.
Its aqueous solution, commonly known as water glass, is a mineral binder. Its chemical formula is R2O·nSiO2, where R2O is the alkali metal oxide, and n is the ratio of the mole number of silicon dioxide to the alkali metal oxide, which is called the mole number of water glass. Water glass commonly used in construction is an aqueous solution of sodium silicate.
YPE Items | TYPE 1 | TYPE 2 | TYPE 3 | TYPE 4 | TYPE 5 |
Na2O, % | 25.5-29 | 23.0-26.0 | 21.0-23.0 | 18.5-22.5 | 19.0-21.0 |
SiO2, % | 49.0-53.0 | 51.0-55.5 | 56.0-62.0 | 55.0-64.0 | 60.0-66.5 |
Modulus | 2.00±0.10 | 2.30±0.05 | 2.85±0.05 | 3.00±0.05 | 3.30±0.05 |
Dissolving Velocity (S)30°C | 60 max | 80 max | 180 max | 240 max | 240 max |
Bulk Density(g/ml) | 0.30-0.80 | 0.40-0.80 | 0.50-0.80 | 0.50-0.80 | 0.60-0.80 |
Particle Size(Pass 120 mesh screen) | 95% min | 95% min | 95% min | 95% min | 95 |


Sodium Silicate is mainly used in the industries of paper, soap, detergent, construction materials, delicate casting, anti corrasion material, textile, and mineral floating select. And it is primary raw material of rubber silicone, silicon aluminum rubber, moisture absorbent, catalyst and its carrier, desalt agent of brine, hydrated silica and absorbent.