Potassium sulfite

Potassium sulfite
Names
IUPAC name
Potassium sulfite
Other names
  • E225
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.279 Edit this at Wikidata
UNII
  • InChI=1S/2K.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2 ☒N
    Key: BHZRJJOHZFYXTO-UHFFFAOYSA-L ☒N
  • InChI=1/2K.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
    Key: BHZRJJOHZFYXTO-NUQVWONBAU
  • [O-]S(=O)[O-].[K+].[K+]
Properties
K2SO3
Molar mass 158.26 g/mol
Appearance White solid
Density 2.49 g/cm3[1]
Soluble
Acidity (pKa) 8
−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).
☒N verify (what is checkY☒N ?)

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. Potassium sulfite is used for preserving food and beverages.[2]

  1. ^ Cite error: The named reference Chalmers was invoked but never defined (see the help page).
  2. ^ "Potassium sulfite (225)". Codex Alimentarius. Food and Agriculture Organization of the United Nations.