FC-75 is a fluorocarbon derivative of tetrahydrofuran with the chemical formula C8F16O. It is practically insoluble in water.

FC-75
Names
IUPAC name
2,2,3,3,4,4,5-heptafluoro-5-(1,1,2,2,3,3,4,4,4-nonafluorobutyl)tetrahydrofuran
Other names
Perfluorocyclic ether, Fluorinert FC-75,
Perfluoro-compound FC-75,
Perfluoro-2-n-butyl THF,
Perfluoro(butyltetrahydrofuran)
Identifiers
3D model (JSmol)
Abbreviations PFBTHF
ECHA InfoCard 100.005.809 Edit this at Wikidata
EC Number
  • 206-389-5
UNII
  • C1(C(C(OC1(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)F)(F)F)(F)F)(F)F
Properties
C8F16O
Molar mass 416.06
Melting point −88 °C (−126 °F; 185 K)
Boiling point 102 °C (216 °F; 375 K)
Insoluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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It is one of the 3M Fluorinert fluids. It is used as an inert coolant fluid in electronics and other applications, and as a solvent. FC-75 can be synthesized by the same electrochemical fluorination process used to produce PFOA.[1] However, other perfluorinated ether isomers will also result.

H(CH2)7COCl + HF → H(CH2)7COF + C7H16 + 2C8F16O + HCl + H2

A similar fluorocarbon-based coolant and solvent is perfluorohexane.

References

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  1. ^ Savu, P (1994). "Fluorinated Higher Carboxylic Acids". Kirk-Othmer Encyclopedia of Chemical Terminology. John Wiley & Sons, Inc. doi:10.1002/0471238961.0612211519012221.a01. ISBN 9780471484943.