Performance Benefits

  • Low Viscosity - Low viscosity at exceptionally low temperatures, Therminol LT is excellent for pumping at extreme cooling applications.
  • Excellent Low Temperature Performance - Therminol LT has the best low temperature heat transfer coefficient of all coolant fluids. Therminol LT has excellent heat transfer properties to -75°C (-100°F).
  • Vapor Phase Operation - Therminol LT can be used in the liquid phase between -75°C (-100°F) and 315°C (600°F). With a boiling point of 181°C (358°F) at ambient pressure, Therminol LT can be used in the vapor phase above 181°C (358°F).

Typical Properties

AppearanceClear, light yellow liquid
CompositionAlkyl substituted aromatic
Maximum bulk temperature315°C (600°F)
Maximum film temperature345°C (650°F)
Normal boiling point181°C (358°F)
Pumpability, at 300 mm2/s (cSt)-75°C (-103°F)
Crystallizing point-75°C (-103°F)
Autoignition temperature (ASTM E-659)412°C (774°F)
Autoignition temperature (DIN 51794)429°C (804°F)
Minimum liquid temperatures for fully developed turbulent flow (NRe > 10000)
10 ft/sec, 1 in tube (3.048 m/s, 2.54 cm tube)-66°C (-87°F)
20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube)< -73°C (-100°F)
Minimum vapor temperatures for fully developed turbulent flow (NRe > 10000)
10 ft/sec, 1 in tube (3.048 m/s, 2.54 cm tube)139°C (283°F)
20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube)116°C (241°F)
Coefficient of thermal expansion at 100°C0.001080/°C (0.000600/°F)
Heat of vaporization at max. use temperature223 kJ/kg (95.7 Btu/lb)
Kinematic viscosity at 100°C (ASTM D-445)0.48 mm2/s (cSt)
Kinematic viscosity at 40°C (ASTM D-445)0.81 mm2/s (cSt)
Average molecular weight134
Pseudocritical temperature377°C (710°F)
Pseudocritical pressure34.5 bar (500 psia)
Pseudocritical density298 kg/m3 (2.49 lb/ft3)
Moisture content, maximum (ASTM E-203)80 ppm
Surface tension in air at 25°C28.0 dynes/cm
Dielectric constant @ 23°C (ASTM D-924)2.30
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