 | |
| Names | |
|---|---|
| Preferred IUPAC name Sodium propanoate | |
| Other names Sodium propionate Napropion E281 | |
| Identifiers | |
| |
3D model (JSmol) | |
| ChEBI | |
| ChEMBL | |
| ChemSpider |
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| ECHA InfoCard | 100.004.810 |
| EC Number |
|
| E number | E281(preservatives) |
| UNII | |
| |
| |
| 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 inethanol | 41.7 g/L |
| Pharmacology | |
| S01AX10 (WHO) QA16QA02 (WHO) | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Sodium propanoate orsodium propionate is thesodiumsalt ofpropionic acid which has thechemical formulaNa(C2H5COO). This white crystalline solid isdeliquescent in moist air.
It is produced by the reaction ofpropionic acid andsodium carbonate orsodium hydroxide.
It is used as a foodpreservative and is represented by the food labelingE number E281 in Europe; it is used primarily as a mold inhibitor in bakery products. It is approved for use as afood additive in the EU,[2] USA[3] and Australia and New Zealand[4] (where it is listed by itsINS number 281).
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.
