|Molecular formula||C 6 H 10 CaO 4|
|External identifiers / databases|
|Molar mass||186.22 g mol −1|
> 300 ° C
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .|
Calcium propionate is an odorless, colorless salt of propionic acid in its pure form with the empirical formula C 6 H 10 CaO 4 . Calcium propionate decomposes at around 300 ° C. If the compound contains unreacted propionic acid from the production process, it has a pungent odor. The fungistatic inhibits the growth of fungi and is used as a preservative (E 282) in food - especially for bread and other baked goods . Calcium propionate is also used in cosmetics or as a feed additive to compound feed .
Calcium propionate is obtained in a direct synthesis; here calcium oxide and calcium hydroxide are placed in a mixer and reacted with propionic acid. Pure calcium hydroxide could also be used, but since water is formed as a by-product, calcium oxide can be used, which reacts with the water to form calcium hydroxide. Excess water is evaporated under negative pressure (0.6 to 0.95 bar ) at approx. 70–90 ° C.
- Calcium oxide and propionic acid react when heated and under pressure to form calcium propionate and water
Sub-steps of the reaction:
With prolonged administration of propionic acid and propionates in the feed of rats in doses between 0.6 and 5%, these cause changes in the forestomach ( thickening and inflammation). However, this is classified as a species-specific reaction for rats, since no such effects were observed in other animal species such as mice and rabbits.
- Entry on E 282: Calcium propionate in the European database for food additives, accessed on June 27, 2020.
- Entry on CALCIUM PROPIONATE in the CosIng database of the EU Commission, accessed on February 24, 2020.
- Richard J. Lewis, Sr .: Hawley's Condensed Chemical Dictionary . 15th edition. Wiley-Interscience, 2007, ISBN 978-0-471-76865-4 (English).
- Data sheet calcium propionate from Acros, accessed on February 24, 2013.
- Kenkyu Nenpo - Tokyo-toritsu Eisei Kenkyusho. Annual Report of Tokyo Metropolitan Research Laboratory of Public Health. Vol. 27, Pg. 159, 1976.
- Entry on calcium propionate in the ChemIDplus database of the United States National Library of Medicine (NLM) .
- A. Renard: "Sur les propionates métalliques" in Comptes rend. hebd. 1887 , 104 , pp. 913-917. Full text
- CA O'Connell, D. Dollimore: "A study of the decomposition of calcium propionate, using simultaneous TG-DTA" in Thermochimica Acta 2000 , 357-358 , pp. 79-87. doi : 10.1016 / S0040-6031 (00) 00371-3
- AK Galwey, ME Brown: Thermal Decomposition of Ionic Solids: Chemical Properties and Reactivities of Ionic Crystalline Phases . Elsevier, 1999, ISBN 0-08-054279-4 , pp. 451 ( limited preview in Google Book search).
- H.-G. Classen, PS Elias, WP Hammes, M. Winter: Toxicological-hygienic assessment of food ingredients and additives. Behr's Verlag, 2001, ISBN 978-3-86022-806-7 .