MOLYBDENUM HEXAFLUORIDE
- CAS NO.：7783-77-9
- Empirical Formula: F6Mo
- Molecular Weight: 209.93
- MDL number: MFCD00014220
- EINECS: 232-026-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-06-23 16:59:16
What is MOLYBDENUM HEXAFLUORIDE?
Chemical properties
liquid
Physical properties
White cubic crystals or colorless volatile liquid; hygroscopic; density 2.54 g/cm3; melts at 17.5°C; boils at 34°C; critical temperature 200°C; critical pressure 46.88 atm; critical volume 226 cm3/mol; reacts with water (hydrolyzed).
The Uses of MOLYBDENUM HEXAFLUORIDE
Separation of molybdenum isotopes.
The Uses of MOLYBDENUM HEXAFLUORIDE
Molybdenum(VI) fluoride plays an important role in the semiconductor industry and the nuclear industry.
Preparation
Molybdenum hexafluoride is prepared by passing fluorine over molybdenum powder:
Mo + 3F2 → MoF6.
Definition
ChEBI: Molybdenum hexafluoride is a molybdenum halide.
Hazard
Strong irritant.
Purification Methods
Purify the hexafluoride by low-temperature trap-to-trap distillation over pre-dried NaF. It is hygroscopic, fumes in moist air and is hydrolysed readily by H2O. [Oppengard et al. J Am Chem Soc 82 3825 1960, Anderson & Winfield J Chem Soc, Dalton Trans 337 1986, Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 259 1963.] Poisonous vapours.
Properties of MOLYBDENUM HEXAFLUORIDE
| Melting point: | 17.5 °C(lit.) |
| Boiling point: | 37 °C(lit.) |
| Density | 2.3 g/mL at 25 °C(lit.) |
| Flash point: | 35°CC |
| solubility | Miscible with saturated hydrocarbons, chlorinated and fluorinated hydrocarbons. |
| form | Liquid |
| color | Colorless |
| Water Solubility | hydrolyzed in H2O; soluble anhydrous HF: 1.5 moles/1000g HF [MER06] |
| Sensitive | Hygroscopic |
| Crystal Structure | Cubic |
| Merck | 14,6237 |
| Exposure limits | ACGIH: TWA 2.5 mg/m3 NIOSH: IDLH 250 mg/m3 |
| CAS DataBase Reference | 7783-77-9(CAS DataBase Reference) |
| EPA Substance Registry System | Molybdenum fluoride (MoF6), (OC-6-11)- (7783-77-9) |
Safety information for MOLYBDENUM HEXAFLUORIDE
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06 |
| GHS Hazard Statements |
H314:Skin corrosion/irritation H318:Serious eye damage/eye irritation H330:Acute toxicity,inhalation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P309:IF exposed or if you feel unwell: P310:Immediately call a POISON CENTER or doctor/physician. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P402+P404:Store in a dry place. Store in a closed container. |
Computed Descriptors for MOLYBDENUM HEXAFLUORIDE
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