Calcium acetate
Template:Short description <templatestyles src="Chembox/styles.css"/>
Template:Chembox image cellTemplate:Chembox image cellTemplate:Chembox AllOtherNamesTemplate:Chembox headerbarTemplate:Chembox IndexlistTemplate:Chembox JmolTemplate:Chembox ChEMBLTemplate:Chembox ECHATemplate:Chembox E numberTemplate:Chembox IUPHAR ligandTemplate:Chembox UNIITemplate:Chembox CompToxTemplate:Chembox headerbarTemplate:Chembox SolubilityInWaterTemplate:Chembox headerbarTemplate:Chembox HazardsTemplate:Chembox headerbarTemplate:Chembox Datapage checkTemplate:Yesno| Template:Longitem | Template:Unbulleted list |
| Abbreviations | Ca(OAc)2 |
| Template:Longitem | 3692527 |
| ChEBI | Template:Unbulleted list |
| ChemSpider | Template:Unbulleted list |
| DrugBank | Template:Unbulleted list |
| EC Number | Template:Unbulleted list |
| Template:Longitem | 22320 |
| KEGG | Template:Unbulleted list |
| Template:Longitem | Template:Unbulleted list |
| RTECS number | Template:Unbulleted list |
| Script error: No such module "collapsible list". | |
| Script error: No such module "collapsible list". | |
| Template:Longitem | Template:Chembox Elements/molecular formula |
| Molar mass | 158.166 g/mol (anhydrous) 176.181 g/mol (monohydrate) |
| Appearance | White solid hygroscopic |
| Odor | slight acetic acid odor |
| Density | 1.509 g/cm3 |
| Melting point | Template:Chembox CalcTemperatures |
| Solubility | slightly soluble in methanol, hydrazine insoluble in acetone, ethanol and benzene |
| Acidity (pKa) | ca. 0.7 |
| Template:Longitem | −70.7·10−6 cm3/mol |
| Template:Longitem | 1.55 |
| Template:Longitem | V03AE07 (WHO) |
| Template:Longitem | Magnesium acetate |
Template:Chembox Footer/tracking container onlyScript error: No such module "TemplatePar".Template:Short description
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
- 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.[2]
- Calcium acetate is used as a food additive, as a stabilizer, buffer and sequestrant, mainly in candy products under the number E263.
- Tofu is traditionally obtained by coagulating soy milk with calcium sulfate. Calcium acetate has been found to be a better alternative; being soluble, it requires less skill and a smaller amount.[3]
- Because it is inexpensive, calcium acetate was once a common starting material for the synthesis of acetone before the development of the cumene process:[4][5]
- Ca(CH3COO)2 → CaCO3(s) + (CH3)2CO
- A saturated solution of calcium acetate in alcohol forms a semisolid, flammable gel that is much like "canned heat" products such as Sterno.[6] Chemistry teachers often prepare "California Snowballs", a mixture of calcium acetate solution and ethanol.[7] The resulting gel is whitish in color, resembling a snowball and can be lit on fire; it will burn for around 20 minutes.[8]
Natural occurrence
Pure calcium acetate is yet unknown among minerals. CalclaciteTemplate:Mdashcalcium acetate chloride pentahydrateTemplate:Mdashis listed as a known mineral,[9] but its genesis is anthropogenic (human-generated, as opposed to naturally occurring).[10]
References
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
Template:Drugs for treatment of hyperkalemia and hyperphosphatemia