:Zinc peroxide
{{chembox
| Watchedfields = changed
| verifiedrevid = 454732324
| Name = Zinc peroxide
| ImageFile =
| ImageName = Zinc peroxide
| OtherNames = zinc dioxide
zinc bioxide
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|??}}
| CASNo = 1314-22-3
| EINECS = 215-226-7
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 0I969DVM77
| PubChem = 10129902
| SMILES = [Zn+2].[O-][O-]
| StdInChI = InChI=1S/O2.Zn/c1-2;/q-2;+2
| StdInChIKey = IPTOGCUGCFHDSS-UHFFFAOYSA-N
}}
|Section2={{Chembox Properties
| Formula = ZnO2
| MolarMass = 97.408 g/mol
| Appearance = white-yellowish powder
| Density = 1.57 g/cm3
| MeltingPtC = 212
| MeltingPt_notes = (decomposes)
| BoilingPt =
| pKa = ~7 (3% solution)
| BandGap =3.8 eV (indirect) {{cite journal| journal = Journal of Physics and Chemistry of Solids
| volume = 23| issue = 12| year =1962| pages = 1685–1688| doi = 10.1016/0022-3697(62)90205-6 | author = A.L. Companion| title = The diffuse reflectance spectra of zinc oxide and zinc peroxide| bibcode = 1962JPCS...23.1685C}}
}}
|Section3={{Chembox Structure
| CrystalStruct = Cubic
| SpaceGroup = Pa{{overline|3}}
}}
|Section7={{Chembox Hazards
| GHSPictograms = {{GHS03}}{{GHS07}}
| GHSSignalWord = Warning
| HPhrases = {{H-phrases|271|315|319}}
| PPhrases = {{P-phrases|}}
| NFPA-H = 3
| NFPA-R = 1
| NFPA-F = 0
}}
}}
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.{{cite journal| journal = J. Phys. Chem. |volume = 75|issue= 20| year =1971| pages = 3089–3092 | author = R.D. Ayengar| title = ESR Studies on Zinc Peroxide and Zinc Oxide Obtained from a Decomposition of Zinc Peroxide| doi=10.1021/j100689a009}}
Preparation and structure
Zinc peroxide can be synthesized through the reaction of zinc chloride and hydrogen peroxide.{{cite journal| journal = J. Phys. Chem.|volume = 113| issue = 4| year =2009| pages = 1320–1324 | author = W. Chen| title = Synthesis, Thermal Stability and Properties of Zinc Peroxide Nanoparticles | doi = 10.1021/jp808714v | s2cid=53965473 |url = http://bib-pubdb1.desy.de//record/88245/files/JPCC_vol113%282009%29p1320-1324.pdf}}
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 .{{cite journal| journal = The American Journal of Nursing |volume = 41|issue= 6| year =1941| pages = 645–649 | author = F. Meleney| title = Zinc Peroxide in Surgical Infections| doi=10.1097/00000446-194106000-00004|s2cid = 75606177}}
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.{{cite web |url=http://www.sciencelab.com/msds.php?msdsId=9925490 |title=Zinc Peroxide Material Safety Sheet|access-date= 2012-05-27}}