Molybdaendioxid
Molybdenum dioxide
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Grundinformationen
- CAS
18868-43-4- Standard-SMILES
[O]=[Mo]=[O]- InChIKey
QXYJCZRRLLQGCR-UHFFFAOYSA-N- Summenformel
- MoO2
- Durchschnittliche Molmasse
- 127,95 g/mol
- Monoisotopische Masse
- 129,89523744
Namen und Bezeichner
- Bevorzugter Name
- Molybdenum dioxide
- IUPAC
- dioxomolybdenum
- Lokaler Name
- Molybdaendioxid
- Englischer Name
- Molybdenum(IV) oxide
- Summenformel
- MoO2
- Molmasse
- 127.94
Namen und Synonyme
Molybdenum dioxide18868-43-4Molybdenum(IV) oxideMolybdenum oxide (MoO2)MoO2DTXSID10879986RefChem:819145DTXCID3022162242-637-9dioxomolybdenumMOLYBDENUM (IV) OXIDEMFCD00014223
Weitere Namen anzeigen
MOLYBDENUM OXIDEMolybdenum(IV) oxide, 99.95%ioxomolybdenumMolybdaendioxidMOLYBDENUM (IV) OXIDMolybdenum(IV)dioxide
EINECS 242-637-9DiketomolybdenumBis(oxido)molybdenumEC 242-637-9Molybdenum(IV) oxide, 97%Molybdenum(IV) oxide, 99%SCHEMBL129727Q415673
Datenbank-Bezeichner
- CAS
18868-43-4- PubChem CID
- 29320
- DTXSID
DTXSID10879986- EC Number
- 242-637-9
- Nikkaji
- J1.270.094F、J96.263E
Eigenschaften
Berechnete StruktureigenschaftenWird ergänzt
- Polarare Oberfläche (TPSA)
- 34,1 Ų
- H-Brücken-Donoren
- 0
- H-Brücken-Akzeptoren
- 2
- Frei drehbare Bindungen
- 0
- Schwere Atome
- 3
- Formalladung
- 0
- Komplexität
- 18,3
Experimentelle und physikochemische Eigenschaften
Chemical ClassesMetals -> Metals, Inorganic Compounds
SpringerMaterials Propertiesdielectric constant
Physical Description
CBI
Lead-gray solid; [Hawley] Red-brown odorless powder; Insoluble in water; [MSDSonline] Solid (dark blue crystals) that is a metallic conductor and weakly paramagnetic; [Ullmann]
Physikochemische Eigenschaften
- Schmelzpunkt
- 85 · decomposes [JAN85]
- Dichte
- 6.47 g/mL · 6.47 g/mL at 25 °C (lit.)
- storage temp.
- Store at room temperature, keep dry and cool
- Löslichkeit
- 2 O, · insoluble in H2O, acid solutions, alkaline solutions
- Aggregatzustand
- Powder
- Farbe
- Red-brown
- Wichte
- 6.47 · 6.47
- Wasserlöslichkeit
- 2 SO4; · slightly soluble H2SO4; insoluble HCl, HF, and alkalies [HAW93]
Sicherheit und Regulatorisches
Sicherheitsangaben dienen nur zur Orientierung und ersetzen weder das Sicherheitsdatenblatt (SDB) des Lieferanten noch geltende Vorschriften oder eine fachliche Bewertung.
GHS-Klassifizierung
GHS Classification
This chemical does not meet GHS hazard criteria for 91.9% (57 of 62) of all reports.
Not Classified
Aggregated GHS information provided per 62 reports by companies from 4 notifications to the ECHA C&L Inventory.
Gefahrenhinweise
Regulatory Information
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
Hazards SummaryAn irritant; [MSDSonline] See Molybdenum.
Hazard Classes and CategoriesNot Classified
Sicherheit und Schutzausrüstung
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]
Chemie und Industrie
Verwendung und Herstellung
U.S. Production2023: 1,000,000 - <8,500,000 lb
Industry UsesIntermediate
General Manufacturing Information
Primary Metal Manufacturing
Molybdenum oxide (MoO2): ACTIVE
Anwendungen
VerwendenMolybdenum(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.
Darstellung
synthetischeMolybdenum(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.
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