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Technical Data Sheet
Therminol® 75 Heat Transfer Fluid

  • HTF - active pharmaceutical ingredients
  • Chemicals & PETrochemicals
  • Distillation
  • Lube oil refining
  • Oil recycling
  • Refining
  • Specialty chemicals
  • Tall oil
Key Attributes
  • Critical System Design
  • High Temperature Stability and Performance
  • Low Pressure

Product Description

Therminol 75 synthetic heat transfer fluid is a ultra-high temperature liquid phase heat transfer fluid having excellent thermal stability.

Performance Benefits

  • High-Temperature Stability and Performance—Therminol 75 is an exceptionally stable heat transfer fluid. It delivers a heat transfer coefficient which is equivalent or higher than other natural or synthetic liquids in the same boiling range.
  • Low Pressure—Therminol 75 is designed for typical liquid-phase heat transfer fluid systems which operate at low pressures.
  • Critical System Design— Due to the high melting range 40°-70°C (104°-158°F) of Therminol 75, proper system design is important for reliable operation.

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Typical Properties

PropertyTest MethodTypical Value, Units
Appearance Soft solid melting to yellow liquid
Composition Terphenyl/quaterphenyl
Maximum bulk temperature 385 °C (725 °F)
Maximum film temperature 410 °C (770 °F)
Normal Boiling Point 343 °C (649 °F)
Flash Point 
     COCASTM D92185 °C (365 °F)
Autoignition TemperatureASTM E659567 °C (1052 °F)
 DIN 51794538 °C (1000 °F)
Coefficient of thermal expansion 
     @ 200°C 0.000803 /°C (0.000446 /°F)
Liquid Density 
     @ 80°CASTM D 40521041 kg/m3 (8.7 lb/gal)
AcidityASTM D 664<0.2 mg KOH/g
Molecular Weight (Average) 230
Pseudocritical temperature 579 °C (1074 °F)
Pseudocritical pressure 25.3 bar (367 psia)
Pseudocritical density 323 kg/m3 (20.2 lb/ft3)
Moisture Content, maximumASTM E-203200 ppm
Dielectric Constant 
     @ 80°CASTM D-9242.32
Slurry point 75-80 °C (165-175 °F)

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.

10/24/2019 4:31:35 PM