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Copper benzoate

Copper benzoate
IUPAC name copper dibenzoate
CAS number 533-01-7
PubChem 164650
InChI InChI=1/2C7H6O2.Cu/c2*8-7(9)6-4-2-1


Molecular formula C14H10CuO4
Molar mass 305.7728 g/mol
Appearance blue solid
Related Compounds
Other cations sodium benzoate
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Copper benzoate is the chemical compound with the formula Cu(C6H5CO2)2. This coordination complex derived from the cupric ion and the conjugate base of benzoic acid. Because copper emits blue when heated in a flame, this salt has found some use as a source of blue light in fireworks.[1]


Preparation is easily done by mixing aqueous solutions of sodium benzoate or potassium benzoate and copper sulfate. Solid copper benzoate forms as a bluish-green precipitate and can be collected by filtration. The equations for these reactions are:

CuSO4 + 2KC6H5CO2 → Cu(C6H5CO2)2 + K2SO4
CuSO4 + 2NaC6H5CO2 → Cu(C6H5CO2)2 + Na2SO4


  1. ^ Wouter's Practical Pyrotechnics page. Retrieved on 2007-01-08.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Copper_benzoate". A list of authors is available in Wikipedia.
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