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Copper benzoate

Copper benzoate


IUPAC name	copper dibenzoate
Identifiers
CAS number	533-01-7
PubChem	164650
SMILES	C1=CC=C(C=C1)C(=O)[O-].C1=CC =C(C=C1)C(=O)[O-].[Cu+2]
InChI	InChI=1/2C7H6O2.Cu/c28-7(9)6-4-2-1 -3-5-6;/h21-5H,(H,8,9);/q;;+2/p-2/f2 C7H5O2.Cu/q2*-1;m
Properties
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]

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Preparation

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: