Selenium hexafluoride

Selenium hexafluoride
Names
IUPAC name
Selenium hexafluoride
Other names
Selenium(VI) fluoride, Selenium fluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.149.506 Edit this at Wikidata
RTECS number
  • VS9450000
UNII
  • InChI=1S/F6Se/c1-7(2,3,4,5)6 ☒N
    Key: LMDVZDMBPZVAIV-UHFFFAOYSA-N ☒N
  • InChI=1S/F6Se/c1-7(2,3,4,5)6
    Key: LMDVZDMBPZVAIV-UHFFFAOYAP
  • F[Se](F)(F)(F)(F)F
Properties
SeF6
Molar mass 192.9534 g/mol
Appearance colourless gas
Density 0.007887 g/cm3[1]
Melting point −39 °C (−38 °F; 234 K)
Boiling point −34.5 °C (−30.1 °F; 238.7 K) sublimes
insoluble
Vapor pressure >1 atm (20°C)[2]
−51.0·10−6 cm3/mol
1.895
Structure
Orthorhombic, oP28
Pnma, No. 62
octahedral (Oh)
0
Thermochemistry
-1030 kJ/mol[3]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 toxic, corrosive
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
0
0
Lethal dose or concentration (LD, LC):
10 ppm (rat, 1 hr)
10 ppm (mouse, 1 hr)
10 ppm (guinea pig, 1 hr)[4]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.05 ppm (0.4 mg/m3)[2]
REL (Recommended)
 TWA 0.05 ppm[2]
IDLH (Immediate danger)
 2 ppm[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Selenium hexafluoride is the inorganic compound with the formula SeF6. It is a very toxic colourless gas described as having a "repulsive" odor.[5] It is not widely encountered and has no commercial applications.[6]

  1. ^ Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
  2. ^ a b c d NIOSH Pocket Guide to Chemical Hazards. "#0551". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ Wiberg, E.; Holleman, A. F. (2001). Inorganic Chemistry. Elsevier. ISBN 0-12-352651-5.
  4. ^ "Selenium hexafluoride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  5. ^ "Material Safety" (PDF). Retrieved 2010-07-24.
  6. ^ Langner, B. E. "Selenium and Selenium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a23_525. ISBN 978-3527306732.