| |
| |
| Names | |
|---|---|
| IUPAC name
Nitrogen trifluoride
| |
| Other names
Nitrogen fluoride
Trifluoramine Trifluorammonia | |
| Identifiers | |
3D model (JSmol)
|
|
| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.029.097 |
| EC Number |
|
| 1551 | |
PubChem CID
|
|
| RTECS number |
|
| UNII | |
| UN number | 2451 |
CompTox Dashboard (EPA)
|
|
| |
| |
| 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)
|
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, H373 | |
| 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)
|
TWA 10 ppm (29 mg/m3)[4] |
REL (Recommended)
|
TWA 10 ppm (29 mg/m3)[4] |
IDLH (Immediate danger)
|
1000 ppm[4] |
| Safety data sheet (SDS) | AirLiquide |
| Related compounds | |
Other anions
|
nitrogen trichloride nitrogen tribromide nitrogen triiodide ammonia |
Other cations
|
phosphorus trifluoride arsenic trifluoride antimony trifluoride bismuth trifluoride |
Related binary fluoro-azanes
|
tetrafluorohydrazine |
Related compounds
|
dinitrogen difluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Nitrogen trifluoride is the inorganic compound with the formula (NF
3). It is a colorless, non-flammable, toxic gas with a slightly musty odor. In contrast with ammonia, it is nonbasic. It finds increasing use within the manufacturing of flat-panel displays, photovoltaics, LEDs and other microelectronics.[6] NF
3 is a greenhouse gas, with a global warming potential (GWP) 17,200 times greater than that of CO
2 when compared over a 100-year period.[7][8][9]
- ^ 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).
- ^ Cite error: The named reference
Kirkwas invoked but never defined (see the help page). - ^ "Climate Change 2007: The Physical Sciences Basis" (PDF). IPCC. Retrieved 2008-07-03.
{{cite journal}}: Cite journal requires|journal=(help) - ^ Robson, J. I.; Gohar, L. K.; Hurley, M. D.; Shine, K. P.; Wallington, T. (2006). "Revised IR spectrum, radiative efficiency and global warming potential of nitrogen trifluoride". Geophys. Res. Lett. 33 (10): L10817. Bibcode:2006GeoRL..3310817R. doi:10.1029/2006GL026210.
- ^ Richard Morgan (2008-09-01). "Beyond Carbon: Scientists Worry About Nitrogen's Effects". The New York Times. Archived from the original on 2018-01-23. Retrieved 2008-09-07.
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