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Technical Data Sheet
Therminol® 54 Heat Transfer Fluid

  • HTF - bakery
  • HTF - edible oil
  • HTF - fertilizer
  • HTF - fine chemicals
  • HTF - food production
  • HTF - food/feed/beverage processing
  • HTF - frying oil
  • Laminate flooring
  • Laundries
  • Oil recycling
  • Polyamide
  • Polymer processing
  • Road asphalt
  • Specialty chemicals
  • Wood panels
Key Attributes
  • Excellent pumpability
  • Excellent resistance to fouling
  • Non-sludge-producing chemistry

Product Description

Therminol 54 is a synthetic fluid designed to provide reliable, consistent heat transfer performance over a long service life at maximum bulk temperatures up to 280°C (540°F). Therminol 54 fluid is designed for use in non-pressurized/low-pressure, indirect heating systems. It delivers efficient, dependable, uniform process heat with no need for high pressures.

Performance Benefits

  • Excellent pumpability—Therminol 54 supports operations with temperatures lower than possible with many other mineral oils.
  • Non-sludge-producing chemistry—The use of Therminol 54 enables life-cycle operational cost efficiencies, including optimal pump seal life, fewer system cleanings between refills, and superior fluid life.
  • Excellent resistance to fouling—Because Therminol 54 is a synthetic fluid, it resists the effects of oxidation 10 times better than mineral oils.

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Typical Properties

PropertyTest MethodTypical Value, Units
Appearance Clear, yellow liquid
Composition Synthetic hydrocarbon mixture
Maximum bulk temperature 280 °C (540 °F)
Maximum film temperature 310 °C (590 °F)
Normal Boiling Point 351 °C (664 °F)
     @300 mm2/s (cSt) -8 °C (17 °F)
     @ 2000 mm2/s (cSt) -28 °C (-18 °F)
Flash Point 
     COCASTM D92170 °C (340 °F)
Autoignition TemperatureASTM E659330 °C (625 °F)
Pour PointISO 3016-45 °C (-50 °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) 67 °C (152 °F)
     20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube) 45 °C (114 °F)
Minimum liquid temperatures for transitional region flow, (NRe > 2000) 
     10 ft/s, 1-in. tube (3.048 m/s, 2.54-cm tube) 24 °C (75 °F)
     20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube) 11 °C (52 °F)
Coefficient of thermal expansion 
     @ 200°C (392°F) 0.000961 /°C (0.000534 /°F)
Heat of Vaporizationa 234 kJ/kg (100 Btu/lb)
Molecular Weight (Average) 310
Pseudocritical temperature 512 °C (953 °F)
Pseudocritical pressure 13.2 bar (191 psia)
Pseudocritical density 258 kg/m3 (16.1 lb/ft3)
Moisture Content, maximumASTM E-203150 ppm
Dielectric Constant 
     @ 23°CASTM D-9242.23

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.

10/23/2019 11:28:01 AM