Sodium propionate

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Sodium propionate[1]
Sodium propanoate.png
CAS number 137-40-6 YesY
PubChem 8724
ChemSpider 8399 YesY
ATC code S01AX10,QA16QA02
Jmol-3D images Image 1
Molecular formula C3H5NaO2
Molar mass 96.060 g/mol
Appearance Transparent crystals
Odor faint acetic-butyric odor
Melting point 289 °C (552 °F; 562 K)
Solubility in water ~1 g/mL
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Sodium propanoate or sodium propionate is the sodium salt of propionic acid which has the chemical formula Na(C2H5COO).


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


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).


  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". Retrieved 2011-10-27. 
  4. ^ Australia New Zealand Food Standards Code"Standard 1.2.4 - Labelling of ingredients". Retrieved 2011-10-27. 

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