Potassium propanoate

Chemical compound From Wikipedia, the free encyclopedia

Potassium propanoate or potassium propionate is a chemical compound with the chemical formula K(C2H5COO). It is the potassium salt of propanoic acid.

Quick facts Names, Identifiers ...
Potassium propanoate
Names
Preferred IUPAC name
Potassium propanoate
Other names
Potassium propionate; E283
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.005.749 Edit this at Wikidata
EC Number
  • 206-323-5
E number E283 (preservatives)
UNII
  • InChI=1S/C3H6O2.K/c1-2-3(4)5;/h2H2,1H3,(H,4,5);/q;+1/p-1 ☒N
    Key: BWILYWWHXDGKQA-UHFFFAOYSA-M ☒N
  • InChI=1/C3H6O2.K/c1-2-3(4)5;/h2H2,1H3,(H,4,5);/q;+1/p-1
    Key: BWILYWWHXDGKQA-REWHXWOFAC
  • CCC(=O)[O-].[K+]
Properties
C3H5KO2
Molar mass 112.1689 g/mol
Appearance Colorless crystalline platelets[1]
Melting point 358 to 366 °C; 676 to 691 °F; 631 to 639 K[2]
soluble[1]
Solubility in ethanol soluble[1]
Thermochemistry
Enthalpy of fusion fHfus)
179 kJ/kg[2]
Hazards
GHS labelling:[3]
GHS07: Exclamation mark
Warning
H302, H317, H319
P261, P264, P264+P265, P270, P272, P280, P301+P317, P302+P352, P305+P351+P338, P321, P330, P333+P317, P337+P317, P362+P364, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation

Potassium propanoate can be prepared by treating potassium carbonate with propanoic acid.[2]

Use

It is used as a food preservative and is represented by the food labeling E number E283 in Europe[4] and by the INS number 283 in Australia and New Zealand.[5]

Reactions

Decomposition takes place via ketonization, yielding the symmetric ketone (3-pentanone) and potassium carbonate:[2]

2K(O2CEt) → K2CO3 + Et(CO)Et

References

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