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Identifiers | |||
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3D model (JSmol)
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ECHA InfoCard | 100.029.115 | ||
EC Number |
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PubChem CID
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UNII | |||
CompTox Dashboard (EPA)
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Properties | |||
TeF6 | |||
Molar mass | 241.590 g/mol | ||
Appearance | colorless gas | ||
Odor | repulsive odor | ||
Density | 0.0106 g/cm3 (-10 °C) 4.006 g/cm3 (-191 °C) | ||
Melting point | −38.9 °C (−38.0 °F; 234.2 K)[2] | ||
Boiling point | −37.6 °C (−35.7 °F; 235.6 K)[2] | ||
decomposes | |||
Vapor pressure | >1 atm (20°C)[1] | ||
−66.0·10−6 cm3/mol | |||
Refractive index (nD)
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1.0009 | ||
Structure | |||
Orthorhombic, oP28 | |||
Pnma, No. 62 | |||
octahedral (Oh) | |||
0 | |||
Thermochemistry | |||
Heat capacity (C)
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117.6 J/(mol K) | ||
Std enthalpy of
formation (ΔfH⦵298) |
-1318 kJ/mol | ||
Hazards | |||
Lethal dose or concentration (LD, LC): | |||
LCLo (lowest published)
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5 ppm (rat, 4 hr) 5 ppm (mouse, 1 hr) 5 ppm (rabbit, 4 hr) 5 ppm (guinea pig, 4 hr)[3] | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible)
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TWA 0.02 ppm (0.2 mg/m3)[1] | ||
REL (Recommended)
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TWA 0.02 ppm (0.2 mg/m3)[1] | ||
IDLH (Immediate danger)
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1 ppm[1] | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tellurium hexafluoride is the inorganic compound of tellurium and fluorine with the chemical formula TeF6. It is a colorless, highly toxic gas with an unpleasant odor.[4]
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