Potassium silicate

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Potassium silicate
Preferred IUPAC name

Potassium metasilicate

Other names

Liquid glass
Waterglass

Identifiers
CAS number 1312-76-1 N
PubChem 66200
ChemSpider 59585 YesY
EC number 233-001-1
Jmol-3D images {{#if:[K+].[K+].[O-][Si]([O-])=O|Image 1
Properties
Molecular formula K2O3Si
Molar mass 154.28 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
0
Related compounds
Other anions Potassium carbonate
Potassium germanate
Potassium stannate
Potassium plumbate
Other cations Sodium silicate
 N (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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.

Uses

Woodwork protection against fire

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]

Horticulture

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

Industrial uses

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.

See also

Sodium silicate

References

  1. ↑ Cobleigh, Rolfe (1909). Handy farm devices and how to make them. Part II: Worth knowing to render wood fireproof. New York: Orange Judd. 
  2. ↑ Elmore AR (2005). "Final report on the safety assessment of potassium silicate, sodium metasilicate, and sodium silicate". Int. J. Toxicol. 24 (Suppl 1): 103–17. PMID 15981734. 

External links

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