Potassium Sulfite (500gr)

Potassium Sulfite (500gr)

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:

K₂S₂O₅ → K₂SO₃ + SO₂

Potassium sulfite

Names
IUPAC name Potassium sulfite
Other names E225
Identifiers
CAS Number	10117-38-1
3D model (JSmol)	Interactive image
ChemSpider	23332
ECHA InfoCard	100.030.279
PubChem CID	24958
UNII	015KZC652E
CompTox Dashboard (EPA)	DTXSID80889532
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Properties
Chemical formula	K2SO3
Molar mass	158.26 g/mol
Appearance	White solid
Solubility in water	Soluble
Acidity (pKa)	8
Magnetic susceptibility (χ)	−64.0·10−6 cm3/mol
Hazards
Flash point	Non-flammable
Related compounds
Other anions	Potassium sulfate Potassium selenite
Other cations	Sodium sulfite
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).