Molybdaendioxid
MoO2 · MOLYBDENUM OXIDE · MOLYBDENUM DIOXIDE · Molybdenum(IV) oxide, 99.95% · ioxomolybdenum · Molybdaendioxid · dioxomolybdenum · diketomolybdenum
Identifikatoren & physikalische Daten
| CAS No. | 18868-43-4 |
|---|---|
| Summenformel | MoO2 |
| Durchschnittliche Molmasse | 127,95 g/mol |
| Monoisotopische Masse | 129,89523744 g/mol |
| SMILES | [O]=[Mo]=[O] |
| InChIKey | QXYJCZRRLLQGCR-UHFFFAOYSA-N |
| PubChem CID | 29320 |
| EC No. | 242-637-9 |
| DTXSID | DTXSID10879986 |
| Lokaler Name | Molybdaendioxid |
Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 34,1 |
|---|---|
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 2 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 3 |
| Formalladung | 0 |
| Komplexität | 18,3 |
| Stoffklassen | Metals -> Metals, Inorganic Compounds |
| SpringerMaterials Properties | dielectric constant |
| Physical Description | CBILead-gray solid[Hawley] Red-brown odorless powderInsoluble in water[MSDSonline] Solid (dark blue crystals) that is a metallic conductor and weakly paramagnetic[Ullmann] |
| Schmelzpunkt | decomposes [JAN85] |
| Dichte | 6.47 g/mL at 25 °C (lit.) |
| Lagerbedingungen | Store at room temperature, keep dry and cool |
| Löslichkeit | insoluble in H2O, acid solutions, alkaline solutionsslightly soluble H2SO4insoluble HCl, HF, and alkalies [HAW93] |
| Aggregatzustand | Powder |
| Farbe | Red-brown |
| Wichte | 6.47 |
| Spezifische Wärmekapazität | Cp(crystal): 0.44 J/(g·K), at 25℃ |
| Hauptanwendungen | battery manufacturing |
| InChI | 1S/Mo.2O |
| InChIKey | QXYJCZRRLLQGCR-UHFFFAOYSA-N |
| SMILES | O=[Mo]=O |
| CAS Datenbank | 18868-43-4(CAS DataBase Reference) |
| EPA chemische Informationen | Molybdenum oxide (MoO2) (18868-43-4) |
Sicherheit & Vorschriften
| GHS-Einstufung | This chemical does not meet GHS hazard criteria for 91.9% (57 of 62) of all reports.Not ClassifiedAggregated GHS information provided per 62 reports by companies from 4 notifications to the ECHA C&L Inventory. |
|---|---|
| Regulatorische Informationen | Chemical: Molybdenum oxide (MoO2)Molybdenum oxide (MoO2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Molybdenum oxide (MoO2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 30-07-2021 https://echa.europa.eu/registration-dossier/-/registered-dossier/10167 |
| Gefahrenübersicht | An irritant[MSDSonline] See Molybdenum. |
| Hazard Classes and Categories | Not Classified |
| Threshold Limit Values (TLV) | 10.0 [mg/m3], as Mo, inhal. fraction, 3 mg/m3, as Mo, respir. fraction (metal and insol. compds) |
| Permissible Exposure Limit (PEL) | 15.0 [mg/m3], as Mo, total dust (metal and insol. compds.) |
| Protective Action Criteria (PAC) | 40 [mg/m3]440 [mg/m3]2600 [mg/m3] |
| Wassergefährdungsklasse (WGK) | 1 |
| TSCA-Inventar-Status | TSCA listed |
| Zollcode | 28257000 |
| RTECS-Nr. | QA4688000 |
| R-Sätze (R) | 20/21/22-36/37/38 |
| Toxizität | mouse,LD50,subcutaneous,318mg/kg (318mg/kg),Zhurnal Vsesoyuznogo Khimicheskogo Obshchestva im. D.I. Mendeleeva. Journal of the D.I. Mendeleeva All-Union Chemical Society. Vol. 19, Pg. 186, 1974. |
| Gefahrensymbole | Xn |
Anwendungen & Verwendung
Verwenden
Molybdenum(IV) oxide (MoO2) is a transition metal oxide with good electrical conductivity due to the presence of delocalized electrons in its valence band. It is traditionally prepared by reducing MoO3 in dry hydrogen in the temperature range of 450-550°C. MoO2 can be used in a variety of energy based applications such as an anode material in rechargeable lithium batteries and fuel flexible solid oxide fuel cells.It can also be used as a catalyst in hydrogen reforming processes.
Herstellung & Synthese
synthetische
Molybdenum(IV) oxide is obtained by passing steam over red hot molybdenum: Mo + 2H2O → MoO2 + 2H2 Alternatively, the oxide may be prepared by heating a molybdate salt, such as ammonium molybdate, with a reducing agent such as zinc. The dioxide also may be obtained along with other oxides of molybdenum when molybdenum metal is heated in air. A brown-black suspension of MoO2 in hydrate form may be obtained by reducing a solution of ammonium molybdate with hydrogen in the presence of colloidal palladium.