Calcium acetate

Calcium acetate

Calcium acetate crystals
Names
IUPAC name
Calcium acetate
Other names
Acetate of lime
Calcium ethanoate
Calcium diacetate
Identifiers
62-54-4 YesY
5743-26-0 (monohydrate) N
3D model (Jmol) Interactive image
Abbreviations Ca(OAc)2
ChEBI CHEBI:3310 YesY
ChEMBL ChEMBL1200800 N
ChemSpider 5890 YesY
DrugBank DB00258 YesY
ECHA InfoCard 100.000.492
EC Number 269-613-0
E number E263 (preservatives)
PubChem 6116
RTECS number AF7525000
UNII Y882YXF34X YesY
Properties
C4H6CaO4
Molar mass 158.17 g·mol−1
Appearance White solid
hygroscopic
Odor slight acetic acid odor
Density 1.509 g/cm3
Melting point 160 °C (320 °F; 433 K)[1] decomposition to CaCO3 + acetone
37.4 g/100 mL (0 °C)
34.7 g/100 mL (20 °C)
29.7 g/100 mL (100 °C)
Solubility slightly soluble in methanol, hydrazine
insoluble in acetone, ethanol and benzene
Acidity (pKa) 6.3-9.6
1.55
Pharmacology
V03AE07 (WHO)
Hazards
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oil Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
1
1
0
680 to 730 °C (1,256 to 1,346 °F; 953 to 1,003 K)
Lethal dose or concentration (LD, LC):
4280 mg/kg (oral, rat)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Calcium acetate is a chemical compound which is a calcium salt of acetic acid. It has the formula Ca(C2H3O2)2. Its standard name is calcium acetate, while calcium ethanoate is the systematic name. An older name is acetate of lime. The anhydrous form is very hygroscopic; therefore the monohydrate (Ca(CH3COO)2•H2O) is the common form.

Production

Calcium acetate can be prepared by soaking calcium carbonate (found in eggshells, or in common carbonate rocks such as limestone or marble) or hydrated lime in vinegar:

CaCO3(s) + 2CH3COOH(aq) Ca(CH3COO)2(aq) + H2O(l) + CO2(g)
Ca(OH)2(s) + 2CH3COOH(aq) → Ca(CH3COO)2(aq) + 2H2O(l)

Since both reagents would have been available pre-historically, the chemical would have been observable as crystals then.

Uses

Ca(CH3COO)2 → CaCO3(s) + (CH3)2CO(v)

References

  1. Dale L. Perry (May 19, 2011). Handbook of Inorganic Compounds (Second ed.). Taylor & Francis. p. 84. ISBN 978-1-4398-1461-1.
  2. Polymeric calcium phosphate cements: setting reaction modifiers
  3. Leo Frank Goodwin; Edward Tyghe Sterne (1920). "Losses Incurred in the Preparation of Acetone by the Distillation of Acetate of Lime.". Industrial & Engineering Chemistry. 12 (3): 240–243. doi:10.1021/ie50123a012.
  4. E. G. R. Ardagh; A. D. Barbour; G. E. McClellan; E. W. McBride (1924). "Distillation of Acetate of Lime.". Industrial & Engineering Chemistry. 16 (11): 1133–1139. doi:10.1021/ie50179a013.
  5. "Canned Heat" at Journal of Chemical Education "Chemistry comes alive!"
  6. Chemistry Teaching Resources
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