Sodium propionate

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.

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
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 ?)
Infobox references

Reactions

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

Uses

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
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

References
  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. doi:10.1107/S2056989020011469. PMC 7472758. PMID 32939309.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.