Selenium hexafluoride
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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]
Quick Facts Names, Identifiers ...
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Names | |||
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IUPAC name
Selenium hexafluoride | |||
Other names
Selenium(VI) fluoride, Selenium fluoride | |||
Identifiers | |||
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.149.506 | ||
PubChem CID |
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RTECS number |
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UNII | |||
CompTox Dashboard (EPA) |
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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 | |||
Refractive index (nD) |
1.895 | ||
Structure | |||
Orthorhombic, oP28 | |||
Pnma, No. 62 | |||
octahedral (Oh) | |||
0 | |||
Thermochemistry | |||
Std enthalpy of formation (ΔfH⦵298) |
-1030 kJ/mol[3] | ||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards |
toxic, corrosive | ||
NFPA 704 (fire diamond) | |||
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)[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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