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Sulphur hexafluoride

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

Esaflon
Sulfur(VI) fluoride

Sulfuric fluoride
Identifiers
3D model (Jmol)
ChEBI
ChemSpider
ECHA InfoCard 100.018.050
EC Number 219-854-2
2752
KEGG
MeSH Sulfur+hexafluoride
PubChem CID
RTECS number WS4900000
UNII
UN number 1080
Properties
SF6
Molar mass 146.06 g/mol
Appearance Colorless gas
Odor odorless
Density 6.17 g/L
Melting point −50.8 °C (−59.4 °F; 222.3 K)
Boiling point −64 °C; −83 °F; 209 K
0.003% (25 °C)
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
Structure
Orthorhombic, oP28
Oh
Orthogonal hexagonal
Octahedral
0 D
Thermochemistry
292 J·mol−1·K−1
−1209 kJ·mol−1
Pharmacology
V08DA05 (WHO)
Hazards
Safety data sheet External MSDS
S-phrases S38
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 1000 ppm (6000 mg/m3)
REL (Recommended)
TWA 1000 ppm (6000 mg/m3)
IDLH (Immediate danger)
N.D.
Related compounds
Related sulfur fluorides
Disulfur decafluoride

Sulfur tetrafluoride

Related compounds
Selenium hexafluoride

Sulfuryl fluoride
Tellurium hexafluoride

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

Esaflon
Sulfur(VI) fluoride

Sulfur tetrafluoride

Sulfuryl fluoride
Tellurium hexafluoride

Sulfur hexafluoride (SF6) is an inorganic, colorless, odorless, non-flammable, extremely potent greenhouse gas, which is an excellent electrical insulator.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, it is poorly soluble in water but quite soluble in nonpolar organic solvents. It is generally transported as a liquefied compressed gas. It has a density of 6.12 g/L at sea level conditions, considerably higher than the density of air (1.225 g/L).

SF
6
can be prepared from the elements through exposure of S
8
to F
2
. This was also the method used by the discoverers Henri Moissan and Paul Lebeau in 1901. Some other sulfur fluorides are cogenerated, but these are removed by heating the mixture to disproportionate any S
2
F
10
(which is highly toxic) and then scrubbing the product with NaOH to destroy remaining SF
4
.


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Wikipedia

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