Trifluoroiodomethane
From Wikipedia, the free encyclopedia
| Trifluoroiodomethane | |
|---|---|
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| IUPAC name | Trifluoroiodomethane |
| Other names | Iodotrifluoromethane, Monoiodotrifluoromethane, Trifluoromethyl iodide, Perfluoromethyl iodide, Freon 13T1 |
| Identifiers | |
| CAS number | [2314-97-8] |
| PubChem | |
| EINECS number | |
| RTECS number | PB6975000 |
| SMILES | C(F)(F)(F)I |
| InChI | 1/CF3I/c2-1(3,4)5 |
| Properties | |
| Molecular formula | CF3I |
| 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 |
| Boiling point |
-22.5 °C |
| Solubility in water | Slightly |
| Vapor pressure | 541 kPa |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | Harmful (Xn) |
| R-phrases | R36/37/38, R44, R68 |
| S-phrases | S7, S26, S36/37/39, S38 |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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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 [1]. It would be used as a gaseous fire suppression flooding agent for in-flight aircraft and electronic equipment fires.
It has been reviewed as environment-safe and non-toxic.[1][2]
Contents |
[edit] Chemistry
It is used in the rhodium-catalyzed α-trifluoromethylation of α,β-unsaturated ketones.[3]
In the presence of sunlight or at temperatures above 100°C it undergoes decomposition with hazardous by-products as hydrogen fluoride (HF), hydrogen iodide (HI) and carbonyl fluoride (COF2).
[edit] Environmental effects
It 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. Thus, even after decomposition, trifluoroiodomethane is likely to be a very effective greenhouse gas.
[edit] Further reading
For further information, a report from the Board on Environmental Studies and Toxicology of the National Academy of Sciences entitled Iodotrifluoromethane: Toxicity Review (2004) is available for free online reading and research in several formats.
[edit] References
- 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:.
- 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:.
- 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:.
- 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:.
- Chamber Studies of Photolysis and Hydroxyl Radical Reactions of Trifluoroiodomethane
- ^ Acute Toxicity Evaluation of Halon Replacement Trifluoroiodomethane (CF3I)
- ^ Reproductive Toxicity Screen of Trifluoroiodomethane (CF31) in Sprague-Dawley Rats
- ^ 171441 Trifluoroiodomethane 99%
