Zinc peroxide

Last updated
Zinc peroxide
Zn2+[O22−]
Names
Other names
zinc dioxide
zinc bioxide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.843 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 215-226-7
PubChem CID
UNII
  • InChI=1S/O2.Zn/c1-2;/q-2;+2
    Key: IPTOGCUGCFHDSS-UHFFFAOYSA-N
  • [Zn+2].[O-][O-]
Properties
ZnO2
Molar mass 97.408 g/mol
Appearancewhite-yellowish powder
Density 1.57 g/cm3
Melting point 212 °C (414 °F; 485 K) (decomposes)
Acidity (pKa)~7 (3% solution)
Band gap 3.8 eV (indirect) [1]
Structure
Cubic
Pa3
Hazards
GHS labelling: [2]
GHS-pictogram-rondflam.svg GHS-pictogram-exclam.svg
Warning
H271, H315, H319
NFPA 704 (fire diamond)
NFPA 704.svgHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
3
0
1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Yes check.svgY  verify  (what is  Yes check.svgYX mark.svgN ?)

Zinc peroxide (ZnO2) is a chemical compound of zinc that appears as a bright yellow powder at room temperature. It was historically used as a surgical antiseptic. More recently zinc peroxide has also been used as an oxidant in explosives and pyrotechnic mixtures. Its properties have been described as a transition between ionic and covalent peroxides. [3]

Contents

Preparation and structure

Structure of solid zinc peroxide FeS2structure.jpg
Structure of solid zinc peroxide

Zinc peroxide can be synthesized through the reaction of zinc chloride and hydrogen peroxide. [4]

According to X-ray crystallography, the compound consists of octahedral Zn(II) centers bonded to six distinct peroxide (O22-) ligands. The overall motif is very similar to that for iron pyrite (FeS2). The structure, with intact O-O bonds, makes clear that this material is a peroxide, not a dioxide.

Medical Use

The treatment of burrowing ulcers in the abdominal wall with zinc peroxide was first recorded in 1933 and throughout the 1940s ZnO2 was used as a disinfectant in surgical . [5] Zinc peroxide was, however, deemed ineffective against certain bacterial strains, such as Streptococcus viridans, staphylococcus aureus, E. coli, B. proteus, and B. pyocyoneus.

Safety

Zinc peroxide is hazardous in case of skin contact, of eye contact, or inhalation. [6]

References

  1. ↑ A.L. Companion (1962). "The diffuse reflectance spectra of zinc oxide and zinc peroxide". Journal of Physics and Chemistry of Solids. 23 (12): 1685–1688. Bibcode:1962JPCS...23.1685C. doi:10.1016/0022-3697(62)90205-6.
  2. ↑ "C&L Inventory". echa.europa.eu.
  3. ↑ R.D. Ayengar (1971). "ESR Studies on Zinc Peroxide and Zinc Oxide Obtained from a Decomposition of Zinc Peroxide". J. Phys. Chem. 75 (20): 3089–3092. doi:10.1021/j100689a009.
  4. ↑ W. Chen (2009). "Synthesis, Thermal Stability and Properties of Zinc Peroxide Nanoparticles" (PDF). J. Phys. Chem. 113 (4): 1320–1324. doi:10.1021/jp808714v. S2CID   53965473.
  5. ↑ F. Meleney (1941). "Zinc Peroxide in Surgical Infections". The American Journal of Nursing. 41 (6): 645–649. doi:10.1097/00000446-194106000-00004. S2CID   75606177.
  6. ↑ "Zinc Peroxide Material Safety Sheet" . Retrieved 2012-05-27.
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