Calcium acetate

Calcium acetate

Calcium acetate crystals
Names
IUPAC name Calcium acetate
Other names Acetate of lime Calcium ethanoate Calcium diacetate
Identifiers
CAS Number	62-54-4 Y 5743-26-0 (monohydrate) N
3D model (Jmol)	Interactive image
Abbreviations	Ca(OAc)2
ChEBI	CHEBI:3310 Y
ChEMBL	ChEMBL1200800 N
ChemSpider	5890 Y
DrugBank	DB00258 Y
ECHA InfoCard	100.000.492
EC Number	269-613-0
E number	E263 (preservatives)
PubChem	6116
RTECS number	AF7525000
UNII	Y882YXF34X Y
InChI InChI=1S/2C2H4O2.Ca/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 Y Key: VSGNNIFQASZAOI-UHFFFAOYSA-L Y InChI=1/2C2H4O2.Ca/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 Key: VSGNNIFQASZAOI-NUQVWONBAW
SMILES [Ca+2].[O-]C(=O)C.[O-]C(=O)C
Properties
Chemical formula	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) decomposition to CaCO3 + acetone
Solubility in water	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
Magnetic susceptibility (χ)	-70.7·10−6 cm3/mol
Refractive index (nD)	1.55
Pharmacology
ATC code	V03AE07 (WHO)
Hazards
NFPA 704	1 1 0
Autoignition temperature	680 to 730 °C (1,256 to 1,346 °F; 953 to 1,003 K)
Lethal dose or concentration (LD, LC):
LD50 (median dose)	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  (what is YN ?)
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.

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:

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