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Link to original content: http://en.wikipedia.org/wiki/Sodium_propionate
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Sodium propionate

From Wikipedia, the free encyclopedia
Sodium propionate[1]
Names
Preferred IUPAC name
Sodium propanoate
Other names
Sodium propionate
Napropion
E281
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.004.810 Edit this at Wikidata
EC Number
  • 205-290-4
E number E281 (preservatives)
UNII
  • InChI=1S/C3H6O2.Na/c1-2-3(4)5;/h2H2,1H3,(H,4,5);/q;+1/p-1 checkY
    Key: JXKPEJDQGNYQSM-UHFFFAOYSA-M checkY
  • InChI=1/C3H6O2.Na/c1-2-3(4)5;/h2H2,1H3,(H,4,5);/q;+1/p-1
    Key: JXKPEJDQGNYQSM-REWHXWOFAH
  • [Na+].[O-]C(=O)CC
Properties
C3H5NaO2
Molar mass 96.060 g/mol
Appearance Transparent crystals
Odor faint acetic-butyric odor
Melting point 289 °C (552 °F; 562 K)
1 g/ml
Solubility in ethanol 41.7 g/L
Pharmacology
S01AX10 (WHO) QA16QA02 (WHO)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Sodium propanoate or sodium propionate is the sodium salt of propionic acid which has the chemical formula Na(C2H5COO). This white crystalline solid is deliquescent in moist air.

Reactions

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It is produced by the reaction of propionic acid and sodium carbonate or sodium hydroxide.

Uses

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It is used as a food preservative and is represented by the food labeling E number E281 in Europe; it is used primarily as a mold inhibitor in bakery products. It is approved for use as a food additive in the EU,[2] USA[3] and Australia and New Zealand[4] (where it is listed by its INS number 281).

Structure

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Structure of sodium propionate, with methyl groups and H atoms omitted.[5] Color code: red = O, blue = Na.

Anhydrous sodium propionate is a polymeric structure, featuring trigonal prismatic Na+ centers bonded to six oxygen ligands provided by the carboxylates. A layered structure is observed, with the hydrophobic ethyl groups projecting into the layered galleries. With hydrated sodium propionate, some of these Na-carboxylate linkages are displaced by water.

See also

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References

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  1. ^ Merck Index, 11th Edition, 8623.
  2. ^ UK Food Standards Agency: "Current EU approved additives and their E Numbers". Retrieved 2011-10-27.
  3. ^ US Food and Drug Administration: "Listing of Food Additives Status Part II". Food and Drug Administration. Retrieved 2011-10-27.
  4. ^ Australia New Zealand Food Standards Code"Standard 1.2.4 - Labelling of ingredients". Retrieved 2011-10-27.
  5. ^ Fábry, Jan; Samolová, Erika (2020). "Layered alkali propanoatesM+(C2H5COO)−;M+= Na+, K+, Rb+, Cs+". Acta Crystallographica Section E. 76 (9): 1508–1513. Bibcode:2020AcCrE..76.1508F. doi:10.1107/S2056989020011469. PMC 7472758. PMID 32939309.
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