| Identification | Back Directory | [Name]
Perfiuoroisobutylene | [CAS]
382-21-8 | [Synonyms]
PFIB
PERFLUOROISOBUTENE
PERFLUORISOBUTYLENE
Perfiuoroisobutylene
Perfluoroisobutylene
Octafluoroisobutylene
Octafiuoroisobutylene
Perfluor-2-methylprop-1-ene
DAFIBNSJXIGBQB-UHFFFAOYSA-N
Octafluoroisobutene, in Nitrogen
1,1,3,3,3-PENTAFLUORO-2-TRIFLUOROMETHYL-1-PROPENE
2-Trifluoromethyl-1,1,3,3,3-pentafluoro-1-propene
2-(Trifluoromethyl)-1,1,3,3,3-pentafluoro-1-propene
1-Propene, 1,1,3,3,3-pentafluoro-2-(trifluoromethyl)- | [Molecular Formula]
C4F8 | [MDL Number]
MFCD00278866 | [MOL File]
382-21-8.mol | [Molecular Weight]
200.03 |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
Propane, 1,1,1,2,3,3,3-heptafluoro-2-isocyanato--->Propane, 1,2-dichloro-1,1,3,3,3-pentafluoro-2-(trifluoromethyl)--->Propane, 1,1,1,2,2,3,3-heptafluoro-3-isocyanato--->PERFLUORO-TERT-BUTYL IODIDE-->Octafluorocyclobutane-->DIBROMODIFLUOROMETHANE | [Preparation Products]
Tetrafluoroethylene |
| Hazard Information | Back Directory | [Description]
Perfluoroisobutylene (PFIB) is a schedule 2A substance under
the Chemical Weapons Convention, which means that while it
has significant ability to be used as a chemical weapon, it also
serves various other industrial uses. | [Uses]
Perfluoroisobutylene or perfluoroisobutene is a monomer used
in synthesis of Teflon and other polymeric materials. It is also
used in etching for semiconductor fabrication, and is potentially
used as a chemical warfare agent. The US Food and Drug
Administration’s CFR 21 Section 173.360 allows for use of
octafluorocyclobutane as a propellant and also allows for PFIB
at a level of <.01% as an impurity in formulation. | [Synthesis Reference(s)]
Journal of the American Chemical Society, 75, p. 2698, 1953 DOI: 10.1021/ja01107a044 | [Safety Profile]
A deadly poison by inhalation. Askin, eye, and mucous membrane irritant. Human acuteexposure causes marked irritation of conjunctivae, throat,and lungs. When heated to decompos | [Environmental Fate]
PFIB exists as a gas in the atmosphere, and is degraded by
reaction with hydroxyl radicals, with a reaction half-life
of ~5.7 days. PFIB is not susceptible to significant photolysis.
The Henry’s law constant of PFIB suggests volatization as
an important fate process. The half lives for volatization
calculated from a model lake and river were 5.6 days and
4.1 h, respectively, though a small portion will adsorb to
suspended solids and sediment. PFIB can also volatize
substantially from moist soils, and to a small degree from dry
soils. | [Toxicity evaluation]
PFIB is a strong electrophile that reacts with nucleophiles. The
toxicity of PFIB may be correlated with its susceptibility to
nucleophilic attack and the generation of reactive
intermediates. | [Toxics Screening Level]
The ITSL for perfluoroisobutylene is 0.8 μg/m3 based on a 1-hour averaging time. |
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