Potassium silicate

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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
NFPA 704.svg
0
1
0
Related compounds
Other anionsPotassium carbonate
Potassium germanate
Potassium stannate
Potassium plumbate
Other cationsSodium 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
 
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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
NFPA 704.svg
0
1
0
Related compounds
Other anionsPotassium carbonate
Potassium germanate
Potassium stannate
Potassium plumbate
Other cationsSodium 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[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]