Potassium sulfite

Potassium sulfite
IUPAC name Potassium sulfite
Other names E225
Identifiers
CAS number	10117-38-1 Y
PubChem	24958
Jmol-3D images	Image 1
SMILES [O-]S(=O)[O-].[K+].[K+]
InChI InChI=[S-2].[K+].[K+]
Properties
Molecular formula	K2SO3
Molar mass	158.26 g/mol
Appearance	white solid
Solubility in water	soluble
Acidity (pKa)	8
Hazards
EU Index	Not listed
Flash point	Non-flammable
Related compounds
Other anions	Potassium sulfate Potassium selenite
Other cations	Sodium sulfite
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Potassium sulfite (K₂SO₃) is a chemical compound which is the salt of potassium cation and sulfite anion. As a food additive it is used as a preservative under the E number E225 (INS number 225). It is approved for use in Australia and New Zealand^[1] and is not approved in the EU.^[2]

References

1. ^ Australia New Zealand Food Standards Code"Standard 1.2.4 - Labelling of ingredients". http://www.comlaw.gov.au/Details/F2011C00827. Retrieved 2011-10-27. 
2. ^ UK Food Standards Agency: "Current EU approved additives and their E Numbers". http://www.food.gov.uk/safereating/chemsafe/additivesbranch/enumberlist. Retrieved 2011-10-27. 

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