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| Names | |
|---|---|
| IUPAC name 1,1,3,3,3-pentafluoro-2-(trifluoromethyl)prop-1-ene | |
| Other names Perfluoroisobutene, Perfluoroisobutylene, Octafluoroisobutylene, Octafluoro-sec-butene, PFIB | |
| Identifiers | |
| CAS Number | |
| 3D model (JSmol) | |
| ECHA InfoCard | 100.108.743 
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| PubChem CID | |
| RTECS number |
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| CompTox Dashboard (EPA) | |
InChI
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SMILES
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| Properties | |
| Chemical formula | C4F8 |
| Molar mass | 200.030 g/mol |
| Density | 8.2 g/l |
| Boiling point | 7.0 °C (280 K) |
| Except where otherwise noted, 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.