Calcium acetate

Calcium acetate
Calcium acetate.svg
Ca-acetate.png
Calcium acetate crystals
Names
IUPAC name
Calcium acetate
Other names
Acetate of lime
Calcium ethanoate
Calcium diacetate
Identifiers
3D model (JSmol)
AbbreviationsCa(OAc)2
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard100.000.492
EC Number269-613-0
E numberE263 (preservatives)
RTECS numberAF7525000
UNII
Properties
C4H6CaO4
Molar mass158.17 g·mol−1
AppearanceWhite solid
hygroscopic
Odorslight acetic acid odor
Density1.509 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)
Solubilityslightly soluble in methanol, hydrazine
insoluble in acetone, ethanol and benzene
Acidity (pKa)6.3-9.6
-70.7·10−6 cm3/mol
1.55
Pharmacology
WHO)
Hazards
NFPA 704
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 ☑Y☒N ?)
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.

Other Languages
čeština: Octan vápenatý
Deutsch: Calciumacetat
Bahasa Indonesia: Kalsium asetat
lietuvių: Kalcio acetatas
Nederlands: Calciumacetaat
polski: Octan wapnia
português: Acetato de cálcio
српски / srpski: Kalcijum acetat
srpskohrvatski / српскохрватски: Kalcijum acetat
svenska: Kalciumacetat
Türkçe: Kalsiyum asetat
Tiếng Việt: Canxi axetat
中文: 乙酸钙