| Perfluoroisobutene | |
|---|---|
|
1,1,3,3,3-pentafluoro-2-(trifluoromethyl)prop-1-ene |
|
|
Other names
Perfluoroisobutene, Perfluoroisobutylene, Octafluoroisobutylene, Octafluoro-sec-butene, PFIB |
|
| Identifiers | |
| CAS number | 382-21-8 |
| PubChem | 61109 |
| RTECS number | UD1800000 |
| Jmol-3D images | Image 1 |
|
|
|
|
| Properties | |
| Molecular formula | C4F8 |
| Molar mass | 200.030 g/mol |
| Density | 8.2 g/l |
| Boiling point |
7.0 °C (280 K) |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
|
| Infobox references | |
Perfluoroisobutene (PFIB), also known as 1,1,3,3,3-pentafluoro-2-(trifluoromethyl)prop-1-ene, is a fluorocarbon alkene. It is a hydrophobic reactive gas with boiling point at 7 °C. It is a strong electrophile.
PFIB is about 10 times as toxic as phosgene. Its inhalation can lead to pulmonary edema, which may be fatal. Onset of symptoms can take 1-4 hours after inhalation. Treatment is based on management of the pulmonary edema (usually with high-dose corticoids and other medication/measures) and associated disorders (e.g. heart failure, hypocalcemia etc.). Many cases resolve within 72 hours without major long-term effects.
In contact with water PFIB undergoes rapid hydrolysis, producing various reactive compounds and fluorophosgene.
PFIB is a product of pyrolysis of polytetrafluoroethylene (PTFE), one of the substances causing polymer fume fever.
It is a Schedule 2 substance of the Chemical Weapons Convention.