| 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 |
0
1
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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.
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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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