Calcium formate

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Structural formula
Structural formula of calcium formate
General
Surname Calcium formate
other names
  • E 238
  • Calcium diformate
  • Calcium methanoate
Molecular formula C 2 H 2 CaO 4
Brief description

colorless, almost odorless solid

External identifiers / databases
CAS number 544-17-2
EC number 208-863-7
ECHA InfoCard 100.008.058
PubChem 10997
Wikidata Q221123
properties
Molar mass 130.11 g mol −1
Physical state

firmly

density

2.02 g cm −3

Melting point

> 380 ° C (decomposition)

solubility
  • easily soluble in water (160 g l −1 at 20 ° C)
  • insoluble in ethanol
safety instructions
GHS labeling of hazardous substances
05 - Corrosive

danger

H and P phrases H: 318
P: 280-305 + 351 + 338
Toxicological data

2650 mg kg −1 ( LD 50 ,  rat ,  oral )

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Calcium formate is a chemical compound from the group of formates, i.e. the calcium salt of formic acid with the constitutional formula Ca (HCOO) 2 .

Occurrence

Calcium formate occurs very rarely in the form of the mineral formicaite .

Extraction and presentation

Calcium formate can be produced by the reaction of carbon monoxide with calcium hydroxide

or reaction of formaldehyde with a calcium compound in aqueous solution (for example calcium hydroxide or calcium peroxide ). It is also produced as a by-product in the manufacture of polyols ( e.g. trimethylolpropane ).

properties

Temperature dependence of the solubility of calcium formate dihydrate in water

Calcium formate is a colorless, almost odorless solid. It is the calcium salt of formic acid. It crystallizes in the orthorhombic crystal system in the space group Pcab (space group no. 61, position 2) with the lattice parameters a = 1016.8  pm , b = 1340.7 pm and c = 627.8 pm. In the unit cell there are eight formula units . Template: room group / 61.2

use

Calcium formate is used for the production of formic acid, as an aid in tannery, as a setting accelerator for cement-bound building materials, as an aid for processing oil emulsions, for the production of silage aids and additives for animal nutrition. The compound was previously used as a food additive (preservative E238), but has not been approved since 1998.

Web links

Individual evidence

  1. ^ Hermann Römpp: Chemistry Lexicon . 5th edition. Franckh'sche Verlagsbuchhandlung, W. Keller & Co., Stuttgart 1962.
  2. ↑ a b c d e f Entry for CAS no. 544-17-2 in the GESTIS substance database of the IFA , accessed on February 1, 2016 (JavaScript required)
  3. ^ Richard J. Lewis, Sr .: Hawley's Condensed Chemical Dictionary . 15th edition. Wiley-Interscience, 2007, ISBN 978-0-471-76865-4 (English).
  4. ↑ Formicait (mineralienatlas.de)
  5. ↑ Ullmann's Encyclopedia of Organic Chemistry
  6. ↑ Process for preparing calcium formats (freepatentsonline) .
  7. ↑ Calcium formats (runyoutech.com) .
  8. ^ H. Stanley: "The Solubility of Some Salts of the Lower Fatty Acids" in The Chemical News 1904 , 89 , p. 193. Full text .
  9. ↑ N. Burger, H. Fuess, SA Mason: "Neutron diffraction of [alpha] -calcium formats at 100 and 296 K" in Acta Cryst. 1977 , B33 , pp. 1968-1970, doi : 10.1107 / S0567740877007444
  10. ↑ Applications calcium formate , Chemische Fabrik Kalk.
  11. ↑ Calcium formate as a food additive (bdsoft)