Sodium Metasilicate CAS#6834-92-0
High Water Solubility: Easily soluble in cold water, making it effective in various aqueous applications.
Hydrolytic Stability: Forms stable aqueous solutions and undergoes controlled hydrolysis when heated or acidified.
Strong Base Properties: Reacts vigorously with acids, making it useful for neutralization processes.
Corrosion Resistance: Despite being corrosive to certain metals in moist air, its stability in other environments ensures safe handling in industrial settings.
Metasilicates are highly soluble in water but are insoluble in alcohol, acidic, and saline solutions. When heated or acidified, sodium metasilicate solutions undergo hydrolysis, releasing free sodium ions and silicic acid. In the presence of moist air, they can be corrosive to metals like zinc, aluminum, tin, and lead, leading to the formation of hydrogen gas. As strong bases, they react vigorously with acids.
Parameters
Melting point | 1089°C |
density | 2.4 |
refractive index | nD25 (glass) 1.520 |
solubility | soluble in cold H2O; reachot H2O; insoluble in ethanol |
form | |
color | White |
Specific Gravity | 2.61 |
PH | 11(1 mM solution);11.91(10 mM solution);12.62(100 mM solution) |
Water Solubility | Soluble in cold water. Hydrolyzes in hot water. Insoluble in acids, alcohol and salt solutions. |
Hydrolytic Sensitivity | 0: forms stable aqueous solutions |
Merck | 14,8642 |
Stability | hygroscopic |
InChIKey | NTHWMYGWWRZVTN-UHFFFAOYSA-N |
CAS DataBase Reference | 6834-92-0(CAS DataBase Reference) |
NIST Chemistry Reference | Sodium silicate(6834-92-0) |
EPA Substance Registry System | Sodium metasilicate (6834-92-0) |
Safety Information
Hazard Codes | C |
Risk Statements | 36/37/38-37-34 |
Safety Statements | 26-45-36/37/39-13-24/25 |
RIDADR | UN 3253 8/PG 3 |
WGK Germany | 1 |
RTECS | VV9275000 |
F | 3 |
TSCA | Yes |
HazardClass | 8 |
PackingGroup | III |
HS Code | 28391910 |
Hazardous Substances Data | 6834-92-0(Hazardous Substances Data) |
