Chemistry:Potassium propanoate
From HandWiki
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| Names | |
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| Preferred IUPAC name
Potassium propanoate | |
| Other names
Potassium propionate; E283
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| Identifiers | |
3D model (JSmol)
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| 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 (ΔfH⦵fus)
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179 kJ/kg[2] |
| Hazards | |
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| GHS Signal word | Warning |
| HH302Script error: No such module "Preview warning".Category:GHS errors, HH317Script error: No such module "Preview warning".Category:GHS errors, HH319Script error: No such module "Preview warning".Category:GHS errors | |
| PP261Script error: No such module "Preview warning".Category:GHS errors, PP264Script error: No such module "Preview warning".Category:GHS errors, PP264+P265Script error: No such module "Preview warning".Category:GHS errors, PP270Script error: No such module "Preview warning".Category:GHS errors, PP272Script error: No such module "Preview warning".Category:GHS errors, PP280Script error: No such module "Preview warning".Category:GHS errors, PP301+P317Script error: No such module "Preview warning".Category:GHS errors, PP302+P352Script error: No such module "Preview warning".Category:GHS errors, PP305+P351+P338Script error: No such module "Preview warning".Category:GHS errors, PP321Script error: No such module "Preview warning".Category:GHS errors, PP330Script error: No such module "Preview warning".Category:GHS errors, PP333+P317Script error: No such module "Preview warning".Category:GHS errors, PP337+P317Script error: No such module "Preview warning".Category:GHS errors, PP362+P364Script error: No such module "Preview warning".Category:GHS errors, PP501Script error: No such module "Preview warning".Category:GHS errors | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
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| 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.[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
- ↑ 1.0 1.1 1.2 J. I. G. Cadogan, J. Buckingham, F. MacDonald: Dictionary of Organic Compounds: First Supplement. CRC Press, 1996, ISBN 978-0-412-54110-0
- ↑ 2.0 2.1 2.2 2.3 Bui, Ly Huong; de Klerk, Arno (2014-02-13). "Thermal Behavior of Potassium C1–C12 n-Alkanoates and Its Relevance to Fischer–Tropsch". Journal of Chemical & Engineering Data 59 (2): 400–411. doi:10.1021/je400874d. ISSN 0021-9568. https://doi.org/10.1021/je400874d.
- ↑ PubChem. "Potassium propionate" (in en). https://pubchem.ncbi.nlm.nih.gov/compound/23663619.
- ↑ 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.
- ↑ Australia New Zealand Food Standards Code"Standard 1.2.4 - Labelling of ingredients". 8 September 2011. http://www.comlaw.gov.au/Details/F2011C00827. Retrieved 2011-10-27.
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