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Technical Data Sheet
Therminol® 62 Heat Transfer Fluid

  • HTF - aluminum foil printing
  • HTF - bakery
  • HTF - production of biodiesel
  • Asphalt
  • Biomass - orc
  • Cement - waste heat recovery + orc
  • Chemicals & PETrochemicals
  • Gas to liquid (gtl)
  • Hybrid solar + orc
  • Oil or gas processing
  • Polymer & plastic
  • Solar csp
  • Wood panels
Key Attributes
  • Fouling Resistant
  • Low Pressure
  • True 325°C (620°F) Performance

Product Description

Therminol 62 is a synthetic heat transfer fluid whose chemistry is custom contoured for high-performance, high-purity, low-pressure and exceptional thermal stability.

Performance Benefits

  • True 325°C (620°F) Performance—Users can expect many years of reliable, trouble-free operation, even when operating continuously at the recommended bulk temperature.
  • Low Pressure—Therminol 62 is designed for typical liquid phase heat transfer fluid systems which operate at low pressures.
  • Fouling Resistant—Therminol 62 is specifically engineered to resist solids formation and system fouling. Your system will operate more reliably and you will save money.

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Typical Properties

PropertyTest MethodTypical Value, Units
Appearance Water-white liquid
Composition Isopropyl biphenyl mixture
Recommended Bulk Temperature 325 °C (620 °F)
Maximum film temperature 355 °C (670 °F)
Normal Boiling Point 333 °C (631 °F)
     @300 mm2/s (cSt) -11 °C (12 °F)
     @ 2000 mm2/s (cSt) -23 °C (-9 °F)
Flash Point 
     COCASTM D92171 °C (340 °F)
     PMCCASTM D93160 °C (320 °F)
Autoignition TemperatureASTM E659407 °C (765 °F)
 DIN 51794433 °C (813 °F)
Pour PointASTM D 97-42 °C (-44 °F)
Minimum liquid temperatures for fully developed turbulent flow (NRe > 10000) 
     10 ft/s, 1-in. tube (3.048 m/s, 2.54-cm tube) 50 °C (122 °F)
     20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube) 31 °C (88 °F)
Minimum liquid temperatures for transitional region flow, (NRe > 2000) 
     10 ft/s, 1-in. tube (3.048 m/s, 2.54-cm tube) 11 °C (52 °F)
     20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube) 4 °C (39 °F)
Coefficient of thermal expansion 
     @ 200°C 0.001000 /°C (0.000556 /°F)
Heat of Vaporizationa 263.9 kJ/kg (113.6 Btu/lb)
Viscosity, Kinematic 
     @ 100°CASTM D 4452.52 cSt, mm2/s
     @ 40°CASTM D 44510.7 cSt, mm2/s
Liquid Density 
     @ 25°CASTM D 4052951.1 kg/m3 (7.94 lb/gal)
AcidityASTM D 664<0.2 mg KOH/g
Molecular Weight (Average) 252
Pseudocritical temperature 487 °C (908 °F)
Pseudocritical pressure 15.0 bar (217.5 psia)
Pseudocritical density 269.4 kg/m3 (16.82 lb/ft3)
Copper CorrosionASTM D 130<<1a
Moisture Content, maximumASTM E-203200 ppm
Dielectric Constant 
     @ 23°CASTM D-9242.53
ChlorineDIN 51577<10 ppm

aat maximum use temperature

Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

8/6/2020 3:53:21 AM