Back Swaelheksafluoried Afrikaans سداسي فلوريد الكبريت Arabic هقزا فلوراید قوقرد AZB Серен хексафлуорид Bulgarian সালফার হেক্সাফ্লোরাইড Bengali/Bangla Hexafluorur de sofre Catalan Fluorid sírový Czech Schwefelhexafluorid German Sulfura heksafluorido Esperanto Hexafluoruro de azufre Spanish

Sulfur hexafluoride

"SF6" redirects here. For the video game, see Street Fighter 6.

Sulfur hexafluoride
Skeletal formula of sulfur hexafluoride with assorted dimensions
Skeletal formula of sulfur hexafluoride with assorted dimensions
Spacefill model of sulfur hexafluoride
Spacefill model of sulfur hexafluoride
Ball and stick model of sulfur hexafluoride
Names
IUPAC name
Sulfur hexafluoride
Systematic IUPAC name
Hexafluoro-λ6-sulfane[1]
Other names
Elagas

Esaflon
Sulfur(VI) fluoride

Sulfuric fluoride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.018.050 Edit this at Wikidata
EC Number
  • 219-854-2
2752
KEGG
MeSH Sulfur+hexafluoride
RTECS number
  • WS4900000
UNII
UN number 1080
  • InChI=1S/F6S/c1-7(2,3,4,5)6 checkY
    Key: SFZCNBIFKDRMGX-UHFFFAOYSA-N checkY
  • FS(F)(F)(F)(F)F
Properties
SF6
Molar mass 146.05 g·mol−1
Appearance Colorless gas
Odor odorless[2]
Density 6.17 g/L
Melting point −64 °C; −83 °F; 209 K
Boiling point −50.8 °C (−59.4 °F; 222.3 K)
Critical point (T, P) 45.51±0.1 °C, 3.749±0.01 MPa[3]
0.003% (25 °C)[2]
Solubility slightly soluble in water, very soluble in ethanol, hexane, benzene
Vapor pressure 2.9 MPa (at 21.1 °C)
−44.0×10−6 cm3/mol
Thermal conductivity
  • 13.45 mW/(m·K) at 25 °C[4]
  • 11.42 mW/(m·K) at 0 °C
Viscosity 15.23 μPa·s[5]
Structure
Orthorhombic, oP28
Oh
Orthogonal hexagonal
Octahedral
0 D
Thermochemistry
0.097 kJ/(mol·K) (constant pressure)
292 J·mol−1·K−1[6]
−1209 kJ·mol−1[6]
Pharmacology
V08DA05 (WHO)
License data
Hazards
GHS labelling:[7]
GHS04: Compressed Gas
Warning
H280
P403
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 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 hazard SA: Simple asphyxiant gas. E.g. nitrogen, helium
1
0
0
SA
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1000 ppm (6000 mg/m3)[2]
REL (Recommended)
 TWA 1000 ppm (6000 mg/m3)[2]
IDLH (Immediate danger)
 N.D.[2]
Safety data sheet (SDS) External MSDS
Related compounds
Related sulfur fluorides
 Disulfur decafluoride

Sulfur tetrafluoride

Related compounds
 Selenium hexafluoride

Sulfuryl fluoride
Tellurium hexafluoride
Polonium hexafluoride

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Sulfur hexafluoride or sulphur hexafluoride (British spelling) is an inorganic compound with the formula SF6. It is a colorless, odorless, non-flammable, and non-toxic gas. SF
6 has an octahedral geometry, consisting of six fluorine atoms attached to a central sulfur atom. It is a hypervalent molecule.

Typical for a nonpolar gas, SF
6 is poorly soluble in water but quite soluble in nonpolar organic solvents. It has a density of 6.12 g/L at sea level conditions, considerably higher than the density of air (1.225 g/L). It is generally transported as a liquefied compressed gas.

SF
6 has 23,500 times greater global warming potential (GWP) than CO2 as a greenhouse gas (over a 100-year time-frame) but exists in relatively minor concentrations in the atmosphere. Its concentration in Earth's troposphere reached 11.50 parts per trillion (ppt) in October 2023, rising at 0.37 ppt/year.[8] The increase since 1980 is driven in large part by the expanding electric power sector, including fugitive emissions from banks of SF
6 gas contained in its medium- and high-voltage switchgear. Uses in magnesium, aluminium, and electronics manufacturing also hastened atmospheric growth.[9]

  1. ^ "Sulfur Hexafluoride - PubChem Public Chemical Database". PubChem. National Center for Biotechnology Information. Archived from the original on 3 November 2012. Retrieved 22 February 2013.
  2. ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0576". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ Horstmann S, Fischer K, Gmehling J (2002). "Measurement and calculation of critical points for binary and ternary mixtures". AIChE Journal. 48 (10): 2350–2356. Bibcode:2002AIChE..48.2350H. doi:10.1002/aic.690481024. ISSN 0001-1541.
  4. ^ Assael MJ, Koini IA, Antoniadis KD, Huber ML, Abdulagatov IM, Perkins RA (2012). "Reference Correlation of the Thermal Conductivity of Sulfur Hexafluoride from the Triple Point to 1000 K and up to 150 MPa". Journal of Physical and Chemical Reference Data. 41 (2): 023104–023104–9. Bibcode:2012JPCRD..41b3104A. doi:10.1063/1.4708620. ISSN 0047-2689. S2CID 18916699.
  5. ^ Assael MJ, Kalyva AE, Monogenidou SA, Huber ML, Perkins RA, Friend DG, May EF (2018). "Reference Values and Reference Correlations for the Thermal Conductivity and Viscosity of Fluids". Journal of Physical and Chemical Reference Data. 47 (2): 021501. Bibcode:2018JPCRD..47b1501A. doi:10.1063/1.5036625. ISSN 0047-2689. PMC 6463310. PMID 30996494.
  6. ^ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 978-0-618-94690-7.
  7. ^ GHS: Record of Schwefelhexafluorid in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 2021-12-13.
  8. ^ Cite error: The named reference sf6trend was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference sf6b20 was invoked but never defined (see the help page).

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