Names | |
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Other names
Copper (II) oxalate, cupric oxalate, copper(2+) ethanedioate
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Identifiers | |
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3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.011.283 |
EC Number |
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PubChem CID
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UNII | |
UN number | 3077 |
CompTox Dashboard (EPA)
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Properties | |
CuC 2O 4 | |
Molar mass | 151.56 |
Appearance | blue-white solid (as a hemihydrate) |
Melting point | 310 °C (590 °F; 583 K) |
insoluble | |
Solubility product (Ksp)
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4.43×10−10[1] |
Hazards | |
GHS labelling: | |
[2] | |
Warning | |
H302, H302+H312, H312 | |
P264, P270, P280, P301+P312, P302+P352, P312, P322, P330, P363, P501 | |
Related compounds | |
Related compounds
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Calcium oxalate Sodium oxalate Magnesium oxalate Strontium oxalate Barium oxalate Iron(II) oxalate Iron(III) oxalate Lithium oxalate Praseodymium oxalate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Copper oxalate is an inorganic compound, a salt of copper metal and oxalic acid with the chemical formula CuC
2O
4.[3] The compound is practically insoluble in water, alcohol, ether, and acetic acid but soluble in ammonium hydroxide.[4] Copper oxalate forms a hydrate, which forms acid-blue crystals.
Copper oxalate can be produced by precipitation from a mixture of a copper (II) salt and a sodium oxalate solution or by reacting copper sulfate with oxalic acid.[5]
As a hemihydrate, copper oxalate is a blue-white solid that is practically insoluble in water. At 200 °C, it loses its water of crystallization.
The compound also forms complex salts with alkali metal oxalates and ammonium oxalate:
Copper oxalate is used as a catalyst for organic reactions, as a stabilizer for acetylated polyformaldehyde[6] and in seed treatment (to repel birds and rodents).[citation needed]