Back ثلاثي فلوريد النتروجين Arabic نیتروژن تریفلورید AZB Trifluorur de nitrogen Catalan Fluorid dusitý Czech Stickstofftrifluorid German Τριφθοριούχο άζωτο Greek Nitrogena trifluorido Esperanto Trifluoruro de nitrógeno Spanish نیتروژن تریفلورید Persian Typpitrifluoridi Finnish
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| Names | |
|---|---|
| IUPAC name
Nitrogen trifluoride
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| Other names
Nitrogen fluoride
Trifluoramine Trifluorammonia | |
| Identifiers | |
3D model (JSmol)
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.029.097 |
| EC Number |
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| 1551 | |
PubChem CID
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| RTECS number |
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| UNII | |
| UN number | 2451 |
CompTox Dashboard (EPA)
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| Properties | |
| NF3 | |
| Molar mass | 71.00 g/mol |
| Appearance | colorless gas |
| Odor | moldy |
| Density | 3.003 kg/m3 (1 atm, 15 °C) 1.885 g/cm3 (liquid at b.p.) |
| Melting point | −207.15 °C (−340.87 °F; 66.00 K) |
| Boiling point | −129.06 °C (−200.31 °F; 144.09 K) |
| 0.021 g/100 mL | |
| Vapor pressure | 44.0 atm[1](−38.5 °F or −39.2 °C or 234.0 K)[a] |
Refractive index (nD)
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1.0004 |
| Structure | |
| trigonal pyramidal | |
| 0.234 D | |
| Thermochemistry | |
Heat capacity (C)
|
53.26 J/(mol·K) |
Std molar
entropy (S⦵298) |
260.3 J/(mol·K) |
Std enthalpy of
formation (ΔfH⦵298) |
−31.4 kcal/mol[2] −109 kJ/mol[3] |
Gibbs free energy (ΔfG⦵)
|
−84.4 kJ/mol |
| Hazards | |
| GHS labelling: | |
| H270, H280, H332 | |
| P220, P244, P260, P304+P340, P315, P370+P376, P403 | |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
LC50 (median concentration)
|
2000 ppm (mouse, 4 h) 9600 ppm (dog, 1 h) 7500 ppm (monkey, 1 h) 6700 ppm (rat, 1 h) 7500 ppm (mouse, 1 h)[5] |
| NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 10 ppm (29 mg/m3)[4] |
REL (Recommended)
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TWA 10 ppm (29 mg/m3)[4] |
IDLH (Immediate danger)
|
1000 ppm[4] |
| Safety data sheet (SDS) | AirLiquide |
| Related compounds | |
Other anions
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nitrogen trichloride nitrogen tribromide nitrogen triiodide ammonia |
Other cations
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phosphorus trifluoride arsenic trifluoride antimony trifluoride bismuth trifluoride |
Related binary fluoro-azanes
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tetrafluorohydrazine |
Related compounds
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dinitrogen difluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Nitrogen trifluoride (NF
3) is an inorganic, colorless, non-flammable, toxic gas with a slightly musty odor. It finds increasing use within the manufacturing of flat-panel displays, photovoltaics, LEDs and other microelectronics.[6] Nitrogen trifluoride is also an extremely strong and long-lived greenhouse gas. Its atmospheric burden exceeded 2 parts per trillion during 2019 and has doubled every five years since the late 20th century.[7][8]
- ^ Air Products; Physical Properties for Nitrogen Trifluoride
- ^ Sinke, G. C. (1967). "The enthalpy of dissociation of nitrogen trifluoride". J. Phys. Chem. 71 (2): 359–360. doi:10.1021/j100861a022.
- ^ Inorganic Chemistry, p. 462, at Google Books
- ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0455". National Institute for Occupational Safety and Health (NIOSH).
- ^ "Nitrogen trifluoride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
- ^ Richard Conniff (2008-11-13). "The Greenhouse Gas That Nobody Knew". Yale School of Environment.
- ^ Cite error: The named reference
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