Sodium orthosilicate
Chemical compound
From Wikipedia, the free encyclopedia
Sodium orthosilicate is the chemical compound with the molecular formula Na
4SiO
4. It is one of the sodium silicates, specifically an orthosilicate, formally a salt of the unstable orthosilicic acid H
4SiO
4.[2][3][4]
Chemical structure of sodium orthosilicate | |
| Names | |
|---|---|
| IUPAC name
Tetrasodium silicate | |
| Other names
Sodium orthosilicate | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.033.387 |
| EC Number |
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PubChem CID |
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| UNII | |
| UN number | 1759 |
CompTox Dashboard (EPA) |
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| Properties | |
| Na4O4Si | |
| Molar mass | 184.040 g·mol−1 |
| Appearance | White powder |
| Melting point | 1,018 °C (1,864 °F; 1,291 K) |
| Hazards | |
| GHS labelling:[1] | |
  | |
| Danger | |
| H302, H314, H335 | |
| P260, P301+P330+P331, P303+P361+P353, P305+P351+P338, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Uses
Sodium orthosilicate has been considered as an interfacial tension reducing additive in the waterflooding of oil fields for enhanced oil extraction. In laboratory settings, it was found to be more effective than sodium hydroxide for some types of oil.[5]
Sodium orthosilicate has been found to stabilize ferrate films as an anticorrosion treatment of iron and steel surfaces.[6]
Natural occurrence
Sodium orthosilicate has not been found to occur in nature. However, the mineral chesnokovite, chemically the related salt disodium dihydrogen orthosilicate Na2SiO2(OH)2·8H2O, was identified in the Kola Peninsula in 2007.[7]
See also
- Sodium metasilicate, Na
2SiO
3