Potassium sulfite
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IUPAC name
Potassium sulfite
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Other names
E225
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Identifiers | |
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3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.030.279 |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
K2SO3 | |
Molar mass | 158.26 g/mol |
Appearance | White solid |
Soluble | |
Acidity (pKa) | 8 |
−64.0·10−6 cm3/mol | |
Hazards | |
Flash point | Non-flammable |
Related compounds | |
Other anions
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Potassium sulfate |
Other cations
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Sodium sulfite |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
what is ?) | (|
Infobox references | |
Potassium sulfite is the inorganic compound with the formula K2SO3. It is the salt of potassium cation and sulfite anion. It is a white solid that is highly soluble in water.
Use[]
Potassium sulfite is widely used for preserving food and beverages.
Production and reactions[]
Potassium sulfite is produced by the thermal decomposition of potassium metabisulfite at 190°C:[1]
- K2S2O5 → K2SO3 + SO2
References[]
- ^ Johnstone, H. F. (1946). "Sulfites and Pyrosulfites of the Alkali Metals". Inorganic Syntheses. 2: 162–167. doi:10.1002/9780470132333.ch49. ISBN 9780470132333.
Categories:
- Potassium compounds
- Sulfites
- Inorganic compound stubs