Potassium silicate

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Potassium silicate
Ball and stick model of polymeric potassium silicate
Identifiers
CAS number1312-76-1 N
PubChem66200
ChemSpider59585 YesY
EC number233-001-1
Jmol-3D imagesImage 1
Properties
Molecular formulaK2O3Si
Molar mass154.28 g mol−1
AppearanceWhite crystals
Hazards
EU classificationCorrosive (C), Irritant (Xi)
R-phrasesR34, R37
S-phrases(S1/2), S13, S24/25, S36/37/39, S45
NFPA 704
Related compounds
Other anionsPotassium carbonate
Potassium germanate
Potassium stannate
Potassium plumbate
Other cationsSodium silicate
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references
 
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Potassium silicate
Ball and stick model of polymeric potassium silicate
Identifiers
CAS number1312-76-1 N
PubChem66200
ChemSpider59585 YesY
EC number233-001-1
Jmol-3D imagesImage 1
Properties
Molecular formulaK2O3Si
Molar mass154.28 g mol−1
AppearanceWhite crystals
Hazards
EU classificationCorrosive (C), Irritant (Xi)
R-phrasesR34, R37
S-phrases(S1/2), S13, S24/25, S36/37/39, S45
NFPA 704
Related compounds
Other anionsPotassium carbonate
Potassium germanate
Potassium stannate
Potassium plumbate
Other cationsSodium silicate
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
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[edit]

Woodwork protection against fire[edit]

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[edit]

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

Industrial uses[edit]

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[edit]

Sodium silicate

References[edit]

External links[edit]