Calcium acetate

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Structural formula
Calcium cation Acetate anion
General
Surname Calcium acetate
other names
  • Calcium ethanoate (according to IUPAC )
  • Calcium acetate
  • Calcium diacetate
  • Gray limestone
  • E  263
  • CALCIUM ACETATE ( INCI )
Molecular formula C 4 H 6 CaO 4
Brief description

colorless solid with an acetic acid odor

External identifiers / databases
CAS number
  • 62-54-4 (anhydrous)
  • 114460-21-8 (hydrate)
EC number 200-540-9
ECHA InfoCard 100,000,492
PubChem 6116
ChemSpider 5890
DrugBank DB00258
Wikidata Q409251
Drug information
ATC code

A12 AA12

properties
Molar mass 158.17 g mol −1
Physical state

firmly

density
  • 2.34 g cm −3
  • 1.5 g cm −3 (20 ° C, hydrate)
Melting point

Decomposition: from 160 ° C

solubility

good in water (400 g l −1 at 0 ° C)

safety instructions
Please note the exemption from the labeling requirement for drugs, medical devices, cosmetics, food and animal feed
GHS labeling of hazardous substances
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases
Toxicological data

4280 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 acetate (E 263) is a chemical compound with the chemical formula Ca (CH 3 COO) 2 . It is a calcium - salt of acetic acid .

properties

Calcium acetate is a white solid with a slight odor of acetic acid and a strongly bitter taste. In the delivery form, calcium acetate contains varying amounts of crystal water. Under normal conditions (room temperature, 65% air humidity) the compound is stable with about 2 mol of crystal water . At 60 ° C the compound dissolves in its own crystal water, which is equivalent to melting.

Calcium acetate is an intermediate product in the production of acetone ( 2 ) from calcium carbonate ( 1 ) and acetic acid with the so-called "lime salt distillation", because when heated u. a. breaks down in acetone:

Production of acetone from calcium carbonate and acetic acid ("lime salt distillation").

use

Calcium acetate is used as an acid-regulating , preserving and firming food additive . It is approved in the EU as a food additive with the number E 263 without a maximum quantity restriction ( quantum satis ) for all foods approved for additives.

Calcium acetate is often used as an extractant for soil samples. It can also be used as a fuel paste in combination with denatured alcohol .

In addition, it is used in nephrology as a drug for the treatment of elevated phosphate levels in chronic kidney failure .

The heat pillows available in many places also contain a calcium or sodium acetate solution . The deformation of the metal plate creates a crystallization nucleus. After a few seconds, all of the acetate has crystallized, but gives off the heat of crystallization that has arisen over a longer period of time. The duration depends primarily on the size of the heat pad (ratio of volume to surface) and on the ambient temperature.

Individual evidence

  1. ↑ Entry on E 263: Calcium acetate in the European database on food additives, accessed on June 27, 2020.
  2. ↑ Entry on CALCIUM ACETATE in the CosIng database of the EU Commission, accessed on February 24, 2020.
  3. ↑ a b c d e f Entry on calcium acetate in the GESTIS substance database of the IFA , accessed on May 9, 2017(JavaScript required) .
  4. ^ Brockhaus ABC Chemie, VEB FA Brockhaus Verlag Leipzig 1965, p. 629.
  5. ↑ Calcium acetate data sheet (PDF) from Carl Roth , accessed on December 14, 2010.