Copper benzoate

Copper benzoate  Error creating thumbnail: Unable to save thumbnail to destination

Names
IUPAC name

copper dibenzoate

Other names

cupric benzoate

Identifiers

CAS Number

* 533-01-7 Y

3D model (JSmol)

* Interactive image
* Chinese lantern structure: Interactive image

ChemSpider |

* 144339 Y

PubChem CID

* 164650

UNII |

* 1M9U62M4WK Y

InChI

* InChI=1S/2C7H6O2.Cu/c2*8-7(9)6-4-2-1-3-5-6;/h2*1-5H,(H,8,9);/q;;+2/p-2 Y

Key: YEOCHZFPBYUXMC-UHFFFAOYSA-L Y

* InChI=1/2C7H6O2.Cu/c2*8-7(9)6-4-2-1-3-5-6;/h2*1-5H,(H,8,9);/q;;+2/p-2

Key: YEOCHZFPBYUXMC-NUQVWONBAX

SMILES

* [Cu+2].[O-]C(=O)c1ccccc1.[O-]C(=O)c1ccccc1

* Chinese lantern structure: c0ccccc0[C-](O[Cu+2]123)O[Cu+2](O[C-](O1)c0ccccc0)(O[C-](O2)c0ccccc0)O[C-](O3)c0ccccc0

Properties

Chemical formula

* C
14H
10CuO
4[1]
* C
14H
12CuO
5 (dihydrate)[2]

Molar mass |

* 305.77 g/mol[1]
* 323.795 g/mol (dihydrate)[2]

Appearance  | blue solid
Density | 1.197 g/cm3
Hazards
GHS pictograms |
GHS Signal word | Warning

GHS hazard statements

| H315, H319, H335

GHS precautionary statements

| PP261Script error: No such module "Preview warning".Category:GHS errors, PP305+P351+P338Script error: No such module "Preview warning".Category:GHS errors
Flash point |  111.4 °C (232.5 °F; 384.5 K)
NIOSH (US health exposure limits):Template:Chembox NIOSH (set)/formatPocketGuideLink

PEL (Permissible)

| TWA 1 mg/m3 (as Cu)

REL (Recommended)

| TWA 1 mg/m3 (as Cu)

IDLH (Immediate danger)

| TWA 100 mg/m3 (as Cu)
Related compounds

Other cations

* Sodium benzoate
* Potassium benzoate

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Y verify (what is YN ?)
Infobox references

Tracking categories (test):

* SizeSet

Copper benzoate is the chemical compound with the formula Cu
2(C

5CO

4(H
2O)
2. These coordination complexes are derived from the cupric ion and the conjugate base of benzoic acid. Many derivatives are known with diverse ancillary ligands.[citation needed] It has found some niche use as a combination fuel and source of copper ion for blue light production in fireworks.[3]

## Contents

* 1 Preparation
* 2 Uses
* 3 Structure
* 4 Related compounds
* 5 References

## Preparation

In laboratory, copper benzoate can be made by combining aqueous solutions of potassium benzoate with copper sulfate. Hydrated copper benzoate precipitates as a pale blue solid:[citation needed]

4 K(C

5CO
2) + 2 CuSO
4 * 5H2O → Cu
2(C

5CO

4(H
2O)
2 \+ 2 K
2SO
4 \+ 8 H

## Uses

It is sometimes used by hobbyists as a fuel and blue flame colorant in pyrotechnics, but it is not on the list of chemicals approved in consumer fireworks in the US.[4]

It is also used in two-part dental adhesives, in polyester resin compositions to increase thermal resistance and decrease gelation, and as a metal-based hydrogen sulfide scavenger in asphalt.[1]

## Structure

Structure of one form of copper(II) benzoate.

Copper(II) benzoate exists in at least two structural forms, depending on the degree of hydration. As in copper(II) acetate, one form of copper benzoate adopts a "Chinese lantern" structure,[5] wherein a pair of copper centers are linked by four bridging carboxylate ligands. Typically, one site on each copper center is occupied by water, which can be replaced by other ligands.[6] A hydrated form is also known, wherein each Cu(II) centre is bound to four water ligands and a bidentate O,O-benzoate.[7]

## Related compounds

* Copper salicylate
* Phenylcopper

## References

1. ↑ 1.0 1.1 1.2 1.3 "Copper Benzoate SDS". Dr. J. Pharmachem Pvt. Ltd.. https://www.jpharmachem.com/content/uploads/2023/12/copper-benzoate-msds.pdf.
2. ↑ 2.0 2.1 Sigma-Aldrich Co., Benzoic acid, copper (II) salt dihydrate.
3. ↑ "Formulas For Firework Stars Using Copper Benzoate" (in en). https://www.skylighter.com/blogs/how-to-make-fireworks/copper-benzoate-blue-fireworks-stars.
4. ↑ "Approved and Prohibited Fireworks Chemicals". US Department of Transportation. https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/approvals-and-permits/hazmat/energetic-materials-approvals/18306/list-approved-and-prohibited-fireworks-chemicals.pdf.
5. ↑ Wells, A. F. (1984). Structural inorganic chemistry (5th ed.). Oxford [Oxfordshire] : New York: Clarendon Press ; Oxford University Press. ISBN 0-19-855370-6.
6. ↑ Kawata, T.; Uekusa, H.; Ohba, S.; Furukawa, T.; Tokii, T.; Muto, Y.; Kato, M. (1 June 1992). "Magneto-structural correlation in dimeric copper(II) benzoates". Acta Crystallographica Section B Structural Science 48 (3): 253–261. doi:10.1107/S0108768191012697.
7. ↑ Koizumi, Hideo; Osaki, Kenji; Watanabé, Tokunosuké (1963). "Crystal Structure of Cupric Benzoate Trihydrate Cu(C6H5COO)23H2O". Journal of the Physical Society of Japan 18 (1): 117–124. doi:10.1143/JPSJ.18.117. Bibcode: 1963JPSJ...18..117K.

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Copper benzoate. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Chemistry:Copper_benzoate&oldid=4033560"
*[CID]: Compound ID
*[H315]: Causes skin irritation
*[H319]: Causes serious eye irritation
*[H335]: May cause respiratory irritation