Syensqo (Solvay Specialty Polymers) Galden® HT55 PFPE Heat Transfer Fluid

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Syensqo (Solvay Specialty Polymers) Galden® HT55 PFPE Heat Transfer Fluid
Categories:	Fluid
Material Notes:	Galden® HT grades are specifically recommended for use as heat transfer fluids. Galden® PFPE is a line of high-performance, inert, fluorinated fluids. Various grades, with a variety of service temperature ranges, are available. Uses include heat transfer, electronic reliability testing, vapor phase soldering, solvents, and acid spill mitigation.
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Physical Properties	Original Value	Comments

Density	1.65 g/cc @Temperature 25.0 °C
Solubility of Water	0.0014 %
Kinematic Viscosity	0.45 cSt @Temperature 25.0 °C
	0.64 cSt @Temperature 0.000 °C
	0.91 cSt @Temperature -20.0 °C
	1.4 cSt @Temperature -40.0 °C
Molecular Weight	340 g/mol	average
Vapor Pressure	225 torr @Temperature 25.0 °C
Surface Tension	16 dynes/cm

Electrical Properties	Original Value	Comments
Volume Resistivity	5.00e+15 ohm-cm
Dielectric Constant	1.86 @Frequency 1000 Hz
Dielectric Strength	15.7 kV/mm	2.54 mm gap
Dissipation Factor	0.00020 @Frequency 1000 Hz

Thermal Properties	Original Value	Comments
Heat of Vaporization	22.0 cal/g @Temperature 55.0 °C	at boiling point
CTE, linear	367 µm/m-°C	converted from volumetric expansion of 0.0011 cm³/cm³-°C
Specific Heat Capacity	0.960 J/g-°C
Thermal Conductivity	0.0650 W/m-K
Boiling Point	55.0 °C
Maximum Service Temperature, Air	55.0 °C	as heat transfer fluid
Minimum Service Temperature, Air	-85.0 °C	as heat transfer fluid
Pour Point	<= -115 °C

Optical Properties	Original Value	Comments
Refractive Index	1.280

Descriptive Properties
Solubility of Air (cm³ gas / 100 cm³ liquid)	26

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