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    GALDEN HT55 PFPE Fluorinated Solution Perfluoropolyether HT70/HT80/HT110/HT135/HT170/HT200/HT230/HT270
    GALDEN HT series are high-performance perfluoropolyether (PFPE) heat transfer fluids identified by CAS Number 69991-67-9. They are fully fluorinated synthetic fluids designed specifically for demanding thermal management applications, offering exceptional thermal stability, chemical inertness and safety.
     
    Our GALDEN HT product line includes 9 standard grades: HT55, HT70, HT80, HT110, HT135 (Low Boiling series) and HT170, HT200, HT230, HT270 (High Boiling series). These grades cover a wide operating temperature range from -125°C to 270°C, making them ideal for use in semiconductor manufacturing, electronics cooling, chemical processing, pharmaceutical production and aerospace industries.
    CAS NO.: 69991-67-9
    Physical and chemical properties:
    Properties Units HT55 HT70 HT80 HT110 HT135 HT170 HT200 HT230 HT270
    Boiling point °C 55 70 80 110 135 170 200 230 270
    Pour point °C <-125 <-110 <-110 <-100 <-100 -97 -85 -77 -66
    Density @25°C g/cm³ 1.65 1.68 1.69 1.71 1.72 1.77 1.79 1.82 1.85
    Kinematic viscosity @25°C cSt 0.45 0.50 0.57 0.77 1.00 1.80 2.40 4.40 14.00
    Vapor pressure @25°C torr 225 141 105 17 5.8 0.8 0.2 0.03 <10⁻²
    Specific heat cal/g·°C 0.23 0.23 0.23 0.23 0.23 0.23 0.23 0.23 0.23
    Heat of vaporization at boiling point cal/g 22 17 17 17 16 16 16 15 15
    Refractive index @25°C - 1.280 1.280 1.280 1.280 1.280 1.280 1.281 1.283 1.283
    Coefficient of thermal expansion cm³/cm³·°C 0.0011 0.0011 0.0011 0.0011 0.0011 0.0011 0.0011 0.0011 0.0011
    Surface tension @25°C dyne/cm 14 14 16 16 17 18 19 19 20
    Thermal conductivity @25°C W/m·K 0.065 0.065 0.065 0.065 0.065 0.065 0.065 0.065 0.065
    Dielectric strength (2.54mm gap) kV 40 40 40 40 40 40 40 40 40
    Dielectric constant @25°C (1kHz) - 1.86 1.86 1.89 1.92 1.92 1.94 1.94 1.94 1.94
    Volume resistivity @25°C Ohm·cm 1·10¹² 1·10¹⁵ 1.5·10¹⁵ 1.5·10¹⁵ 1.5·10¹⁵ 1.5·10¹⁵ 6·10¹⁵ 6·10¹⁵ 6·10¹⁵
    Average molecular weight amu 340 410 430 580 610 760 870 1020 1550
    Dissipation factor @1kHz - 2·10⁻⁴ 2·10⁻⁴ 2·10⁻⁴ 2·10⁻⁴ 2·10⁻⁴ 2·10⁻⁴ 2·10⁻⁴ 2·10⁻⁴ 2·10⁻⁴
    Solubility of water ppm(wt) <10 <10 <10 <10 <10 <10 <10 <10 <10
    Solubility of air cm³ gas/100 cm³ liquid 26 26 26 26 26 26 26 26 26
    All values determined at 25°C unless otherwise specified                    
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