Potassium propanoate

Names

Preferred IUPAC name Potassium propanoate

Other names Potassium propionate; E283

Identifiers

CAS NumberY

3D model (JSmol)

ChemSpiderN

ECHA InfoCard

EC Number206-323-5

E numberE283 (preservatives)

PubChem CID

UNIIY

CompTox Dashboard (EPA)

InChI InChI=1S/C3H6O2.K/c1-2-3(4)5;/h2H2,1H3,(H,4,5);/q;+1/p-1NKey: BWILYWWHXDGKQA-UHFFFAOYSA-MNInChI=1/C3H6O2.K/c1-2-3(4)5;/h2H2,1H3,(H,4,5);/q;+1/p-1Key: BWILYWWHXDGKQA-REWHXWOFAC

SMILES CCC(=O)[O-].[K+]

Properties

Chemical formulaC3H5KO2

Molar mass112.1689 g/mol

AppearanceColorless crystalline platelets

Melting point358 to 366 °C; 676 to 691 °F; 631 to 639 K

Solubility in watersoluble

Solubility in ethanolsoluble

Thermochemistry

Enthalpy of fusion (Δ f H ⦵ fus )179 kJ/kg

Hazards

GHS labelling:

Pictograms

Signal wordWarning

Hazard statementsH302, H317, H319

Precautionary statementsP261, 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). N verify (what is YN ?) Infobox references

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

Preparation

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

Use

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

Reactions

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

2K(O2CEt) → K2CO3 + Et(CO)Et