My watch list

Perfluoroisobutene

Perfluoroisobutene

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	382-21-8
PubChem	61109
RTECS number	UD1800000
SMILES	C(=C(F)F)(C(F)(F)F)C(F)(F)F
InChI	InChI=1/C4F8/c5-2(6)1(3(7,8)9)4(10,11)12
Properties
Molecular formula	C₄F₈
Molar mass	200.030 g/mol
Density	8.2 g/l
Boiling point	7.0 °C (280 K)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Perfluoroisobutene (PFIB), also known as 1,1,3,3,3-pentafluoro-2-(trifluoromethyl)prop-1-ene, is a fluorinated olefine. It is a hydrophobic reactive gas with boiling point at 7 °C. It is a strong electrophile.

Additional recommended knowledge

Daily Sensitivity Test

Daily Visual Balance Check

How to quickly check pipettes?

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 enema reduction. 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.

Category: Chemical weapons