Names | |
---|---|
IUPAC name
Cobalt(II) acetate
| |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.000.687 |
PubChem
CID
|
|
UNII |
|
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
Co(C2H3O2)2 | |
Molar mass | 177.02124 g/mol (anhydrous) 249.08 g/mol (tetrahydrate) |
Appearance | Pink crystals (anhydrous) intense red crystals (tetrahydrate) |
Odor | vinegar (tetrahydrate) |
Density | 1.705 g/cm3 (tetrahydrate) |
Melting point | 140 °C (284 °F; 413 K) (tetrahydrate) |
Soluble | |
Solubility | soluble in alcohol, dilute acids, pentyl acetate (tetrahydrate) |
+11,000·10−6 cm3/mol | |
Refractive index (nD)
|
1.542 (tetrahydrate) |
Hazards | |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LD50 (
median dose)
|
503 mg/kg (oral, rat) |
Safety data sheet (SDS) | J.T. Baker MSDS |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Cobalt(II) acetate is the cobalt salt of acetic acid. It is commonly found as the tetrahydrate Co(CH3CO2)2·4 H2O, abbreviated Co(OAc)2·4 H2O. It is used as a catalyst.
Like many other transition metal acetates, cobalt(II) acetate forms by the reaction of cobalt oxide or hydroxide and acetic acid:
The tetrahydrate has been shown by X-ray crystallography to adopt an octahedral structure, the central cobalt centre being coordinated by four water molecules and two acetate ligands. [1] The analogous nickel acetate is isostructural. [2]
Various hydrates are known including Co(CH3CO2)2·H2O and [Co(CH3CO2)25·0.5 H2O. [3]
Cobalt acetate is a precursor to various oil drying agents, catalysts that allow paints and varnishes to harden. [4]
Anhydrous cobalt acetate is a widely used source of cobalt in the synthesis of materials, [5] catalyst, [6] and complexes. [7]
Cobalt salts are poisonous. [8]
Names | |
---|---|
IUPAC name
Cobalt(II) acetate
| |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.000.687 |
PubChem
CID
|
|
UNII |
|
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
Co(C2H3O2)2 | |
Molar mass | 177.02124 g/mol (anhydrous) 249.08 g/mol (tetrahydrate) |
Appearance | Pink crystals (anhydrous) intense red crystals (tetrahydrate) |
Odor | vinegar (tetrahydrate) |
Density | 1.705 g/cm3 (tetrahydrate) |
Melting point | 140 °C (284 °F; 413 K) (tetrahydrate) |
Soluble | |
Solubility | soluble in alcohol, dilute acids, pentyl acetate (tetrahydrate) |
+11,000·10−6 cm3/mol | |
Refractive index (nD)
|
1.542 (tetrahydrate) |
Hazards | |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LD50 (
median dose)
|
503 mg/kg (oral, rat) |
Safety data sheet (SDS) | J.T. Baker MSDS |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Cobalt(II) acetate is the cobalt salt of acetic acid. It is commonly found as the tetrahydrate Co(CH3CO2)2·4 H2O, abbreviated Co(OAc)2·4 H2O. It is used as a catalyst.
Like many other transition metal acetates, cobalt(II) acetate forms by the reaction of cobalt oxide or hydroxide and acetic acid:
The tetrahydrate has been shown by X-ray crystallography to adopt an octahedral structure, the central cobalt centre being coordinated by four water molecules and two acetate ligands. [1] The analogous nickel acetate is isostructural. [2]
Various hydrates are known including Co(CH3CO2)2·H2O and [Co(CH3CO2)25·0.5 H2O. [3]
Cobalt acetate is a precursor to various oil drying agents, catalysts that allow paints and varnishes to harden. [4]
Anhydrous cobalt acetate is a widely used source of cobalt in the synthesis of materials, [5] catalyst, [6] and complexes. [7]
Cobalt salts are poisonous. [8]