Selenium hexafluoride

Selenium hexafluoride
Names
	IUPAC name Selenium hexafluoride
	Other names Selenium(VI) fluoride, Selenium fluoride
Identifiers
CAS Number	7783-79-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	22964 ;
ECHA InfoCard	100.149.506
PubChem CID	24558;
RTECS number	VS9450000;
UNII	H91D37I668 ;
CompTox Dashboard (EPA)	DTXSID00999041 ;
	InChI InChI=1S/F6Se/c1-7(2,3,4,5)6 Key: LMDVZDMBPZVAIV-UHFFFAOYSA-N ; InChI=1S/F6Se/c1-7(2,3,4,5)6 Key: LMDVZDMBPZVAIV-UHFFFAOYAP;
	SMILES F[Se](F)(F)(F)(F)F;
Properties
Chemical formula	SeF6
Molar mass	192.9534 g/mol
Appearance	colourless gas
Density	7.887 g/L
Melting point	−39 °C (−38 °F; 234 K)
Boiling point	−34.5 °C (−30.1 °F; 238.7 K) sublimes
Solubility in water	insoluble
Vapor pressure	>1 atm (20°C)
Magnetic susceptibility (χ)	−51.0·10−6 cm3/mol
Refractive index (nD)	1.895
Structure
Crystal structure	Orthorhombic, oP28
Space group	Pnma, No. 62
Coordination geometry	octahedral (Oh)
Dipole moment	0
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	−1030 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	toxic, corrosive
NFPA 704 (fire diamond)	3 0 0
	Lethal dose or concentration (LD, LC):
LCLo (lowest published)	10 ppm (rat, 1 hr); 10 ppm (mouse, 1 hr); 10 ppm (guinea pig, 1 hr)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 0.05 ppm (0.4 mg/m3)
REL (Recommended)	TWA 0.05 ppm
IDLH (Immediate danger)	2 ppm
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Selenium hexafluoride is the inorganic compound with the formula SeF₆. It is a very toxic colourless gas described as having a "repulsive" odor. It is not widely encountered and has no commercial applications.