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Fluorinert™ FC-40

Used in nondestructive leak and thermal shock testing for military electronics according to mil spec 883.




Product Overview

A colorless, thermally stable, fully fluorinated liquid.  It's wide liquid range (-57°C to 165°C) make it ideal for a wide variety of applications. The FC-40 liquid is primarily a single compound, so its composition will not shift or fractionate over time. This results in less fluid loss and insures that transport properties do not change with time. 

Product Specifications

Appearance: Clear, colorless
Average Molecular Weight: 650
Boiling Point (1 atm): 165°C
Pour Point: -57°C
Latent Heat of Vaporization (at normal boiling point): 69 J/g
Liquid Density: 1855 kg/m3
Kinematic Viscosity: 2.2 centistokes
Absolute Viscosity: 4.1 centipoise
Liquid Specific Heat: 1100 J kg-1 °C-1 Liquid Thermal Conductivity : 0.062 W m-1 °C-1
Coefficient of Expansion: 0.0012 °C-1
Water Solubility: <7 ppmw
Solubility in Water: <5 ppmw
Ozone Depletion Potential: 0
Dielectric Strength: 46 kV, 0.1" gap
Dielectric Constant: 1.9

Features & Benefits

Compatible with most metals, plastics and elastomers.
Narrow boiling range
Wide liquid range
Thermal stability
Chemical stability


Ideal for a variety of single phase heat transfer applications in the semiconductor manufacturing industry such as etchers, ion implanters and testers.

Related Products

3M™ Fluorinert™ Electronic Liquids

Designed for long-lasting high performance in heat transfer applications in wafer-fab equipment and for direct contact cooling with military grade electronics.

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