Chemistry informtion about Molybdenum(IV) Oxide (CAS NO.18868-43-4) is:
IUPAC Name: Dioxomolybdenum
Synonyms: Molybdenum Dioxide ; Molybdenum (Iv) Oxide ; Molybdenum Oxide ; Molybdenum Oxide Brown ; Molybdenum Oxide (Moo2) ; Molybdenumoxide(Moo2) ; Moo2 ; Molybdenum(Iv) Oxide, 99.95%
Product Categories: Inorganics ; Metal and Ceramic Science ; Molybdenum ; Oxides
MF: MoO2
MW: 127.94
EINECS: 242-637-9
Density: 6.47 g/mL at 25 °C(lit.)
Following is the molecular structure of Molybdenum(IV) Oxide (CAS NO.18868-43-4) is:
MoO2 has been reported as catalysing the dehydrogenation of alcohols and the reformation of hydrocarbons. Molybdenum nano-wires have been produced by reducing MoO2 deposited on graphite.Mineralogical form of this compound is called tugarinovite, only very rarely found.
Molybdenum(IV) Oxide (CAS NO.18868-43-4) can be prepared: by reduction of MoO3 with Mo over the course of 70 hours at 800 °C. The tungsten analogue, WO2, is prepared similarly.
2 MoO3 + Mo → 3 MoO2
by reducing MoO3 with H2 or NH3 below 470°C [2]
Single crystals are obtained by chemical transport using iodine. Iodine reversibly converts MoO2 into the volatile species MoO2I2. Molybdenum oxide is a constituent of "technical molybdenum oxide" produced during the industrial processing of MoS2:
2 MoS2 + 7O2 → 2MoO3 + 4SO2
MoS2 + 6MoO3 → 7MoO2 + 2SO2
2 MoO2 + O2 → 2MoO3
1. | scu-mus LD50:318 mg/kg | ZVKOA6 Zhurnal Vsesoyuznogo Khimicheskogo Obshchestva Imeni D.I. Mendeleeva. Journal of the D.I. Mendeleeva All-Union Chemical Society. 19 (1974),186. |
Reported in EPA TSCA Inventory.
Poison by subcutaneous route. Incandescent reaction with air. When heated to decomposition it emits toxic fumes of Mo. See also MOLYBDENUM COMPOUNDS.
Hazard Codes:
Xn
Risk Statements:
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements:
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36:Wear suitable protective clothing.
WGK Germany: 1
RTECS: QA4688000
OSHA PEL: TWA 10 mg(Mo)/m3, total dust; TWA 5 mg(Mo)/m3, respirable fraction
ACGIH TLV: Insoluble Compounds: inhalable fraction, 10 mg(Mo)/m3, 3 mg(Mo)/m3, respirable fraction.
Molybdenum(IV) Oxide (CAS NO.18868-43-4) is a violet-colored solid and is a metallic conductor. It crystallizes in a monoclinic cell, and has a distorted rutile, (TiO2) crystal structure. In MoO2 the octahedra are distorted, the Mo atoms are off-centre, leading to alternating short and long Mo – Mo distances. The short Mo – Mo distance is 251 pm which is less than the Mo – Mo distance in the metal, 272.5 pm. The bond length is shorter than would be expected for a single bond. The bonding is complex and involves a delocalisation of some of the Mo electrons in a conductance band accounting for the metallic conductivity.
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View