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Potassium silicate: Wikis


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Potassium silicate
IUPAC name
Other names Waterglass
Liquid glass
CAS number 1312-76-1
Molecular formula K2O3Si
Molar mass 154.28 g mol−1
Solubility in water Soluble
EU classification Corrosive (C)
R-phrases R34, R37
S-phrases (S1/2), S13, S24/25, S36/37/39, S45
Related compounds
Other anions Potassium carbonate
Potassium germanate
Potassium stannate
Potassium plumbate
Other cations Sodium silicate
 Yes check.svgY (what is this?)  (verify)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Potassium silicate is a water-soluble and glass-forming silicate salt that is commonly used as an adhesive in welding rods.

This compound has been in use for at least a century.

Rendering the woodwork of houses secure against catching fire can be done at an insignificant cost, and with little trouble. Saturate the woodwork with a very delicate solution of silicate of potash as nearly neutral as possible, and when this has dried, apply one or two coats of a stronger solution."[1]

In horticulture, potassium silicate is used as a soluble source of potassium and silicon. It also makes the growing medium more alkaline.

Some cleaning formulations use potassium silicate, which also serves as a corrosion inhibitor in cosmetics.[2]

Formula is K2SiO3.


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