|Preferred IUPAC name
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||195.91 g/mol|
|Appearance||Colorless odorless gas|
|Density||2.5485 g/cm3 at -78.5 °C|
2.3608 g/cm3 at -32.5 °C
|Melting point||−110 °C (−166 °F; 163 K)|
|Boiling point||−22.5 °C (−8.5 °F; 250.7 K)|
|Vapor pressure||541 kPa|
|Safety data sheet||See: data page|
|Muta. Cat. 3|
|S-phrases (outdated)||(S2), S36/37|
|Supplementary data page|
|Refractive index (n),|
Dielectric constant (εr), etc.
|UV, IR, NMR, MS|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Trifluoroiodomethane, also referred to as trifluoromethyl iodide is a halomethane with the formula CF3I. It is an experimental alternative to Halon 1301 (CBrF3) in unoccupied areas. It would be used as a gaseous fire suppression flooding agent for in-flight aircraft and electronic equipment fires.
It can be used as a new generation fire extinguishing agent to replace Halon in fire protection systems. The mechanism of extinguishing fires for CF3I is active and primarily based on interruption of the chain reaction in the combustion area of the flame by so-called "negative" catalytic action. It is also used as an eco-friendly insulation gas to replace SF6 in electrical power industry.
Trifluoroiodomethane contains carbon, fluorine, and iodine atoms. Although iodine is several hundred times more efficient at destroying stratospheric ozone than chlorine, experiments have shown that because the weak C-I bond breaks easily under the influence of water (owing to the electron-attracting fluorine atoms), trifluoroiodomethane has an ozone depleting potential less than one-thousandth that of Halon 1301 (0.008-0.01). Its atmospheric lifetime, at less than 1 month, is less than 1 percent that of Halon 1301, and less even than hydrogen chloride formed from volcanoes.
There is, however, still the problem of the C-F bonds absorbing in the atmospheric window. However, the IPCC has calculated the 100-year global warming potential of trifluoroiodomethane to be 0.4 (i.e., 40% of that of CO2).
- Duan Y. Y., Shi L., Sun L. Q., Zhu M. S., Han L. Z. (March 2000). "Thermodynamic Properties of Trifluoroiodomethane (CF3I)". International Journal of Thermophysics. 21 (2): 393–404(12). doi:10.1023/A:1006683529436. Retrieved 2007-06-02. (dead link 1 April 2019)
- Duan Y. Y., Shi L., Zhu M. S., Han L. Z. (January 1999). "Surface tension of trifluoroiodomethane (CF3I)". Fluid Phase Equilibria. 154 (1): 71–77(7). doi:10.1016/S0378-3812(98)00439-7. Archived from the original on 2007-10-01. Retrieved 2007-06-02.
- Duan Y. Y., Shi L., Sun L. Q., Zhu M. S., Han L. Z. (1997). "Thermal Conductivity of Gaseous Trifluoroiodomethane (CF3I)". J. Chem. Eng. Data. 42 (5): 890–893 (4). doi:10.1021/je9700378. Retrieved 2007-06-02.
- Duan Y. Y., Shi L., Zhu M. S., Han L. Z. (1999). "Critical Parameters and Saturated Density of Trifluoroiodomethane (CF3I)". J. Chem. Eng. Data. 44 (3): 501–504. doi:10.1021/je980251b. Retrieved 2007-06-02.
- Chamber Studies of Photolysis and Hydroxyl Radical Reactions of Trifluoroiodomethane
- Vitali, Juan. "Halon Substitute Protects Aircrews and the Ozone Layer". www.afrlhorizons.com. Archived from the original on 11 July 2007. Retrieved 2017-09-06.
- "Trifluoroiodomethane 171441". Sigma-Aldrich. Retrieved 2017-09-06.
- "Fire extinguishing agents trifluoroiodomethane/CF3I". beijingyuji. Retrieved 2018-09-20.
- "CFI rim seal fire protection for floating roof tanks" (PDF). 2018-09-20.
- "Investigation of the Performance of CF3I Gas as a Possible Substitute for SF6". researchgate.net. Retrieved 2018-09-20.
- Shimanouchi, T. (1972). "Methane, trifluoroiodo-". webbook.nist.gov. 6 (3): 993–1102. Retrieved 2017-09-06.
- Ramfjord, Birgit (2012-03-05). "Listing of GWP Values as per Report IPCC WG1 AR4" (PDF). Swedish Defence Materiel Administration. Archived from the original (PDF) on 13 March 2016. Retrieved 7 September 2017.