Molybdenum hexacarbonyl Property

Melting point:

150 °C (dec.) (lit.)

Boiling point:

156 °C (lit.)

Density 

1.96 g/mL at 25 °C (lit.)

vapor density 

9.1 (vs air)

vapor pressure 

0.13 hPa (20 °C)

storage temp. 

Store at <= 20°C.

solubility 

Slightly soluble in tetrahydrofuran, diglyme and acetonitrile.

form 

crystal

color 

white

Specific Gravity

1.960

Water Solubility 

insoluble

Hydrolytic Sensitivity

4: no reaction with water under neutral conditions

Exposure limits

ACGIH: TWA 10 mg/m3; TWA 3 mg/m3
NIOSH: IDLH 5000 mg/m3

InChIKey

KMKBZNSIJQWHJA-UHFFFAOYSA-N

CAS DataBase Reference

13939-06-5(CAS DataBase Reference)

NIST Chemistry Reference

Molybdenum hexacarbonyl(13939-06-5)

EPA Substance Registry System

Molybdenum carbonyl (Mo(CO)6), (OC-6-11)- (13939-06-5)

Safety

Hazard Codes 

T+,Xi

Risk Statements 

26/27/28

Safety Statements 

36/37/39-45-36/37-28A-22

RIDADR 

UN 3466 6.1/PG 2

WGK Germany 

3

Hazard Note 

Irritant

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

29310095

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H331Toxic if inhaled

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P271Use only outdoors or in a well-ventilated area.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

Molybdenum hexacarbonyl Chemical Properties,Usage,Production

Chemical Properties

WHITE TO LIGHT YELLOW CRYSTALLINE POWDER

Uses

Plating molybdenum, i.e., molybdenum mir-rors; intermediate.

Uses

It is used as a catalyst in many organicsynthetic reactions.

Uses

Alumina supported molybdenum hexacarbonyl acts as an active catalyst. It is used to synthesize MoO and MoC nanowires by electron beam induced deposition.

General Description

Molybdenum hexacarbonyl is a colorless compound that sublimates and decomposes without melting at 150^oC. It has an octahedral structure. Inherent sublimation of molybdenum hexacarbonyl permits it to perform as an active liquefaction catalyst. To form a catalyst it is adsorbed on dehydroxylated alumina forming subcarboyls.

Hazard

Decomposes above 150C to evolve carbonmonoxide.

Health Hazard

Molybdenum hexacarbonyl is a highly toxicsubstance. It is listed in Toxic SubstanceControl Act. Acute symptoms includeheadache, dizziness, nausea, vomiting, andfever. Because of its low vapor pressure,the risk of exposure of this compound,however, by inhalation is lower than thatfrom the volatile tetra- or pentacoordinatedmetal carbonyls. Ingestion of the compoundcan cause death. Absorption of its solutionthrough skin may cause severe poisoning,manifesting the same effects as those fromother routes of exposure.

Fire Hazard

It reacts violently with strong oxidizers. Contact with concentrated acids is expected to be violent. Its solutions are susceptible to detonate spontaneously (Owen 1950). Ethereal solutions of this compound can explode on extended storage (Bretherick 1995).

Purification Methods

Sublime it in a vacuum before use [Connor et al. J Chem Soc, Dalton Trans 511 1986]. TOXIC.