Potassium silicate | |
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Potassium metasilicate |
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Other names
Liquid glass |
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Identifiers | |
CAS number | 10006-28-7 |
PubChem | 66200 |
ChemSpider | 59585 |
EC number | 233-001-1 |
Jmol-3D images | Image 1 |
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Properties | |
Molecular formula | K2O3Si |
Molar mass | 154.28 g mol−1 |
Exact mass | 153.889084121 g mol-1 |
Appearance | White crystals |
Hazards | |
EU classification | Corrosive (C), Irritant (Xi) |
R-phrases | R34, R37 |
S-phrases | (S1/2), S13, S24/25, S36/37/39, S45 |
NFPA 704 |
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Related compounds | |
Other anions | Potassium carbonate Potassium germanate Potassium stannate Potassium plumbate |
Other cations | Sodium silicate |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
Potassium silicate is a water-soluble and glass-forming silicate salt of general formula K2SiO3 with many common uses for at least a century.
Contents[hide] |
Impregnation of wood with a potassium silicate solution is an easy and low cost way for rendering the woodwork of houses secure against catching fire. The woodwork is first saturated with a diluted and nearly neutral solution of potash silicate. After drying, one or two coats of a more concentrated solution are usually applied.[1]
In horticulture, potassium silicate is used as a soluble source of potassium and makes also the growing medium more alkaline.
Some metal cleaning formulations use potassium silicate, which also serves as a corrosion inhibitor.[2] It also finds various uses in the fabrication of welding rods or even of cosmetics.
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