Calcium acetate

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IUPACName = Calcium acetate
OtherNames = Acetate of lime
Calcium ethanoate
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Abbreviations = Ca(OAc)₂
CASNo = 62-54-4
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SMILES = CC( [O-)] =O.CC( [O-] )=O. [Ca++]
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Formula = C₄H₆O₄Ca
MolarMass = 158.138 g/mol
Appearance = White solid
Density = 1.6 kg/L
MeltingPt = 160 °C
Melting_notes = decomposition to acetone
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Solubility = 400 g/l
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OtherCpds = The chemical compound calcium acetate is the calcium salt of acetic acid. It has the formula Ca(C₂H₃O₂)₂. Its standard name is calcium acetate, while calcium ethanoate is the systematic IUPAC name. An older name is acetate of lime. The anhydrous form is very hygroscopic; therefore the monohydrate (Ca(CH₃COO)₂.H₂O, CAS [5743-26-0] ) is the common form.

If an alcohol is added to a saturated solution of calcium acetate, a semisolid, flammable gel forms that is much like "canned heat" products such as Sterno. [ [http://jchemed.chem.wisc.edu/jcesoft/CCA/CCA3/MAIN/CANHEAT/PAGE1.HTM "Canned Heat" at Journal of Chemical Education "Chemistry comes alive!"] ] Chemistry teachers often prepare "California Snowballs", a mixture of calcium acetate solution and ethanol. The resulting gel is whitish in color, and can be formed to resemble a snowball.

Calclacite is a name for calcium acetate chloride pentahydrate, which is treated as mineral species but possess anthropogenic origin.

History

Because it is inexpensive, calcium acetate was once a common starting material for the synthesis of acetone before the development of the cumene process. [cite journal
title = Losses Incurred in the Preparation of Acetone by the Distillation of Acetate of Lime.
author = Leo Frank Goodwin and Edward Tyghe Sterne
journal = Industrial & Engineering Chemistry
volume = 12
issue = 3
year = 1920
pages = 240–243
doi = 10.1021/ie50123a012 ] [cite journal
title = Distillation of Acetate of Lime.
author = E. G. R. Ardagh, A. D. Bbarbour, G. E. McClellan, and E. W. McBride
journal = Industrial & Engineering Chemistry
volume = 16
issue = 11
year = 1924
pages = 1133–1139
doi = 10.1021/ie50179a013 ]

Uses

In kidney disease, blood levels of phosphate may rise (called hyperphosphatemia) leading to bone problems. Calcium acetate binds phosphate in the diet to lower blood phosphate levels. Side effects of this treatment include upset stomach.

Calcium acetate is a food additive, mainly in candy products.

References