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Hexafluoroisobutylene

3,3,3-Trifluoro-2(trifluoromethyl)-1-propene

Hexafluoroisobutylene (HFIB) is a specialty monomer useful for coatings and fluoropolymers. It is supplied by DuPont as a colorless, pressurized liquid.

Sales Specification

Property    Limit  
Hexafluoroisobutylene, wt %  99.5 min 
Hexafluoropropene, wt %  0.5 max 
Acetone/hexafluoroisovalero lactone, wt %  0.3 max  
H/CH3-substituted hexafluoroisobutylene, wt %  0.5 max  
Trifluoromethane, wt %  0.05 max 
Allene/pentadiene isomers, wt %  0.2 max 
Oxygen, wt %  0.02 max 
Perfluoroisobutylene, wt %  not detected  

Typical Physical Properties*

Property  Value 
CAS Name  3,3,3-Trifluoro-2(trifluoromethyl)-1-propene  
CAS Number  382-10-5 
Molecular formula  C4H2F6  
Molecular weight  164  
Boiling Point   14.5°C (58.1°F)  
Melting Point  -111°C (232°F) 
Volatiles, wt %  100  
Form  Pressurized liquid  
Critical Temperature  156°C (313°F)  
Liquid Density   r(g/mL) = 0.614 + 212/T(K) (0-33°C [32-91°F])  
Vapor Pressure   log P (psia) = 5.574 -1270/T(K) (14.5-72°C [58-162°F])  
Solubility in Water  2.3 � 10-4 g/g water at 23°C (73°F)  

*This table gives typical properties based on historical production performance. DuPont does not make any express or implied warranty that these products will continue to have these typical properties.

Handling

Hexafluoroisobutylene is supplied as a pressurized liquid, which is toxic by inhalation, and may cause irritation of the nose, throat and lungs. Protect against respiratory exposure. Skin contact may cause frostbite; wear appropriate gloves. Refer to the MSDS for additional handling information.

Packages

HFIB is available in pressurized cylinders of 0.45 kg (1 lb) and 1000 kg (2.2 lb) net.

Literature

HFIB Product Bulletin