Sodium propionate
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| Names | |
|---|---|
| Preferred IUPAC name
Sodium propanoate | |
| Other names
Sodium propionate
Napropion E281 | |
| Identifiers | |
3D model (JSmol)
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| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.004.810 |
| EC Number |
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| E number | E281 (preservatives) |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| 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).
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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
[edit]It is produced by the reaction of propionic acid and sodium carbonate or sodium hydroxide.
Uses
[edit]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
[edit]
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
[edit]- Propionic acid, E 280
- Calcium propionate, E 282
- Potassium propionate, E 283
References
[edit]- ^ Merck Index, 11th Edition, 8623.
- ^ UK Food Standards Agency: "Current EU approved additives and their E Numbers". Retrieved 2011-10-27.
- ^ US Food and Drug Administration: "Listing of Food Additives Status Part II". Food and Drug Administration. Retrieved 2011-10-27.
- ^ Australia New Zealand Food Standards Code"Standard 1.2.4 - Labelling of ingredients". Retrieved 2011-10-27.
- ^ 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.
External links
[edit]- Sodium propanoate at Sci-toys.com