Copper(II) acetate
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Copper(II) acetate, also referred to as cupric acetate, is the chemical compound with the formula Cu(OAc)2 where AcO− is acetate (CH
3CO−
2). The hydrated derivative, Cu2(OAc)4(H2O)2, which contains one molecule of water for each copper atom, is available commercially. Anhydrous copper(II) acetate is a dark green crystalline solid, whereas Cu2(OAc)4(H2O)2 is more bluish-green. Since ancient times, copper acetates of some form have been used as fungicides and green pigments. Today, copper acetates are used as reagents for the synthesis of various inorganic and organic compounds.[5] Copper acetate, like all copper compounds, emits a blue-green glow in a flame.
Small crystals of copper(II) acetate | |
Copper(II) acetate monohydrate | |
Names | |
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IUPAC name
Tetra-μ2-acetatodiaquadicopper(II) | |
Other names
Copper(II) ethanoate Cupric acetate Copper acetate Verdigris | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.005.049 |
EC Number |
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PubChem CID |
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UNII |
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UN number | 3077 |
CompTox Dashboard (EPA) |
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Properties | |
Cu(CH3COO)2 | |
Molar mass | 181.63 g/mol (anhydrous) 199.65 g/mol (hydrate) |
Appearance | Dark green crystalline solid |
Odor | Odorless (hydrate) |
Density | 1.882 g/cm3 (hydrate) |
Melting point | 115 °C (anhydrous) [1]
Undetermined (hydrate)[2] |
Boiling point | 240 °C (464 °F; 513 K) |
Hydrate: 7.2 g/100 mL (cold water) 20 g/100 mL (hot water) | |
Solubility | Soluble in alcohol Slightly soluble in ether and glycerol |
Refractive index (nD) |
1.545 (hydrate) |
Structure | |
Monoclinic | |
Hazards | |
GHS labelling: | |
Danger | |
H301, H302, H311, H314, H410, H411, H412 | |
P260, P264, P270, P273, P280, P301+P310, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P361, P363, P391, P405, P501 | |
NFPA 704 (fire diamond) | |
Flash point | Non-flammable |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
710 mg/kg oral rat[3] |
NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 1 mg/m3 (as Cu)[4] |
REL (Recommended) |
TWA 1 mg/m3 (as Cu)[4] |
IDLH (Immediate danger) |
TWA 100 mg/m3 (as Cu)[4] |
Safety data sheet (SDS) | Baker MSDS |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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