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'''Potassium silicate''' is a water-soluble and [[glass]]-forming [[silicate]] salt of general formula K<sub>2</sub>SiO<sub>3</sub> with many common uses for at least a century. |
'''Potassium silicate''' is a water-soluble and [[glass]]-forming [[silicate]] salt of general formula K<sub>2</sub>SiO<sub>3</sub> with many common uses for at least a century. |
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=='''Synthesis'''== |
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it can be synthesized in the laboratory by Reacting Potassium Hydroxide with Silicon Dioxide with stirring at 90 C following this Reaction |
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n SiO2 + 2 KOH → K2O•nSiO2 + H2O |
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==Uses== |
==Uses== |
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Names | |
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Preferred IUPAC name
Potassium metasilicate | |
Other names
Liquid glass | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.029.989 ![]() |
EC Number |
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E number | E560 (acidity regulators, ...) |
PubChem CID |
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CompTox Dashboard (EPA) |
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Properties | |
K2O3Si | |
Molar mass | 154.279 g·mol−1 |
Appearance | White crystals |
Hazards | |
NFPA 704 (fire diamond) | |
Related compounds | |
Other anions |
Potassium carbonate Potassium germanate Potassium stannate Potassium plumbate |
Other cations |
Sodium silicate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Potassium silicate is a water-soluble and glass-forming silicate salt of general formula K2SiO3 with many common uses for at least a century.
it can be synthesized in the laboratory by Reacting Potassium Hydroxide with Silicon Dioxide with stirring at 90 C following this Reaction
n SiO2 + 2 KOH → K2O•nSiO2 + H2O
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]
Inhorticulture, 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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