Potassium sulfite

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 ;
	InChI InChI=1S/2K.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2+1;/p-2 Key: BHZRJJOHZFYXTO-UHFFFAOYSA-L ; InChI=1/2K.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2+1;/p-2 Key: BHZRJJOHZFYXTO-NUQVWONBAU;
	SMILES [O-]S(=O)[O-].[K+].[K+];
Properties
Chemical formula	K2SO3
Molar mass	158.26 g/mol
Appearance	White solid
Density	2.49 g/cm3
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). verify (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. Potassium sulfite is used for preserving food and beverages.

Names

IUPAC name Potassium sulfite
Other names E225
Identifiers
CAS Number	10117-38-1^Y
3D model (JSmol)	Interactive image
ChemSpider	23332^N
ECHA InfoCard	100.030.279
PubChem CID	24958
UNII	015KZC652E^N
CompTox Dashboard (EPA)	DTXSID80889532
InChI 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
SMILES [O-]S(=O)[O-].[K+].[K+]
Properties
Chemical formula	K₂SO₃
Molar mass	158.26 g/mol
Appearance	White solid
Density	2.49 g/cm³
Solubility in water	Soluble
Acidity (pK_a)	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). N verify (what is ^YN ?) Infobox references