Zinc peroxide
Zn2+ [O22−]
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| Names | |
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| Other names
zinc dioxide
zinc bioxide | |
| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.013.843 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| ZnO2 | |
| Molar mass | 97.408 g/mol |
| Appearance | white-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] | |
 
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| Warning | |
| H271, H315, H319 | |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]
Preparation and structure
[edit]
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
[edit]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
[edit]Zinc peroxide is hazardous in case of skin contact, of eye contact, or inhalation.[6]
References
[edit]- ^ 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.
- ^ "C&L Inventory". echa.europa.eu.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "Zinc Peroxide Material Safety Sheet". Retrieved 2012-05-27.