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 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.

Typical Properties

AppearanceClear, water-white liquid
CompositionSynthetic hydrocarbons
Maximum bulk temperature230°C (450°F)
Maximum film temperature245°C (475°F)
Normal boiling point192°C (378°F)
Pumpability, at 300 mm2/s (cSt)-82°C (-116°F)
Pumpability, at 2000 mm2/s (cSt)-94°C (-137°F)
Autoignition temperature (ASTM E-659)247°C (477°F)
Autoignition temperature (DIN 51794)277°C (531°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)-37°C (-35°F)
20 ft/sec, 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/sec, 1 in tube (3.048 m/s, 2.54 cm tube)-64°C (-82°F)
20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube)-71°C (-96°F)
Coefficient of thermal expansion at 100°C0.001116/°C (0.000620/°F)
Kinematic viscosity at 100°C (ASTM D-445)0.65 mm2/s (cSt)
Kinematic viscosity at 40°C (ASTM D-445)1.23 mm2/s (cSt)
Average molecular weight162
Pseudocritical temperature360°C (680°F)
Pseudocritical pressure16.2 bar (235 psia)
Pseudocritical density229 kg/m3 (14.1 lb/ft3)
Moisture content, maximum (ASTM E-203)80 ppm
Dielectric constant @ 23°C (ASTM D-924)2.02
Notice: Although the information and recommendations set forth herein are presented in good faith, Eastman Chemical Company and its wholly owned subsidiary Solutia Inc. make no representations or warranties as to the completeness or accuracy thereof. You must make your own determination of their 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. Nothing contained herein is to be construed as a recommendation to use any product, process, equipment, or formulation in conflict with any patent, and we make no representations or warranties, express or implied, that the use thereof will not infringe any patent. NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR OF ANY OTHER NATURE ARE MADE HEREUNDER WITH RESPECT TO INFORMATION OR THE PRODUCT TO WHICH INFORMATION REFERS AND NOTHING HEREIN WAIVES ANY OF THE SELLER'S CONDITIONS OF SALE.

Safety Data Sheets providing safety precautions that should be observed when handling and storing our products are available online or by request. You should obtain and review available material safety information before handling our products. If any materials mentioned are not our products, appropriate industrial hygiene and other safety precautions recommended by their manufacturers should be observed.