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Technical Data Sheet
Therminol® D-12 Heat Transfer Fluid

  • HTF - active pharmaceutical ingredients
  • HTF - food/feed/beverage processing
  • HTF - pharmaceutical processing
  • Environmental test chambers
  • Specialty and batch chemical production
  • Specialty chemicals
Key Attributes
  • Easy Operation
  • Heating or Cooling Operation
  • Low Cost
  • Low Odor and Excellent Toxicity Profile

Product Description

Therminol D-12 is a synthetic, liquid phase heat transfer fluid with excellent heat transfer properties over a wide temperature range. This fluid is ideally suited for applications that require efficient cooling and heating.

Performance Benefits

  • Heating or Cooling Operation—Therminol D-12 is ideally suited for combination heating and cooling applications and delivers excellent heat transfer rates even at -45°C (-50°F). Batch processes will benefit from the excellent cooling performance Therminol D-12 delivers. Therminol D-12 also may be used as a secondary coolant or "brine" in refrigeration loops where a broad range of properties is desired.
  • Easy Operation—Using Therminol D-12 avoids the problems of using multiple fluids in the same piece of equipment.
  • Low Cost—Therminol D-12 delivers better thermal performance at lower cost than competing fluids.
  • Low Odor and Excellent Toxicity Profile—Therminol D-12 is NSF registered with HT1 status, surpassing requirements for use where there is the possibility of incidental food contact.

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Typical Properties

PropertyTest MethodTypical Value, Units
Appearance Clear, water-white liquid
Composition Synthetic hydrocarbons
Maximum bulk temperature 230 °C (450 °F)
Maximum film temperature 245 °C (475 °F)
Normal Boiling Point 192 °C (378 °F)
     @300 mm2/s (cSt) -82 °C (-116 °F)
     @ 2000 mm2/s (cSt) -94 °C (-137 °F)
Autoignition TemperatureASTM E659247 °C (477 °F)
 DIN 51794277 °C (531 °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) -37 °C (-35 °F)
     20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube) -51 °C (-59 °F)
Minimum liquid temperatures for transitional region flow, (NRe > 2000) 
     10 ft/s, 1-in. tube (3.048 m/s, 2.54-cm tube) -64 °C (-82 °F)
     20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube) -71 °C (-96 °F)
Coefficient of thermal expansion 
     @ 100°C 0.001122 /°C (0.00062 /°F)
Viscosity, Kinematic 
     @ 100°CASTM D 4450.65 cSt, mm2/s
     @ 40°CASTM D 4451.23 cSt, mm2/s
Molecular Weight (Average) 162
Pseudocritical temperature 360 °C (680 °F)
Pseudocritical pressure 16.2 bar (235 psia)
Pseudocritical density 229 kg/m3 (14.1 lb/ft3)
Moisture Content, maximumASTM E-20380 ppm
Dielectric Constant 
     @ 23°CASTM D-9242.02

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.

5/13/2020 9:54:55 AM