Therminol 59 Temperature Range

Performance Benefits

  • Heating or Cooling Operation - Therminol 59 has surprisingly low viscosity for a high temperature heat transfer fluid. It is ideally suited for combination heating and cooling applications delivering excellent heat transfer rates even at 20°C (70°F). Batch processes will benefit from the excellent cooling performance Therminol 59 delivers.
  • Superb Low Temperature Pumpability - Low viscosity at exceptionally cold temperatures makes this an ideal fluid for northern climates. In fact, Therminol 59 was originally developed for use on the North Slope in Alaska, a supreme test of low temperature pumpability.
  • Long Life Means Low Cost - Users can expect many years of reliable, trouble-free operation, even when operating continuously at the recommended upper temperature limit of 315°C (600°F ). Long life means fewer fluid change-outs and that means low operating costs, which is critical in today’s highly competitive business environment.

Typical Properties

AppearanceClear yellow to dark amber liquid
CompositionAlkyl substituted aromatic
Maximum bulk temperature315°C (600°F)
Maximum film temperature345°C (650°F)
Normal boiling point289°C (553°F)
Pumpability, at 300 mm2/s (cSt)-37°C (-35°F)
Pumpability, at 2000 mm2/s (cSt)-49°C (-56°F)
Flash point, COC (ASTM D-92)146°C (295°F)
Flash point, PMCC (ASTM D-93)132°C (270°F)
Autoignition temperature (ASTM E-659)372°C (702°F)
Autoignition temperature (DIN 51794)404°C (760°F)
Pour point (ISO 3016)-68°C (-90°F)
Pour point (ASTM D-97)-61°C (-78°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)17°C (63°F)
20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube)0°C (32°F)
Minimum liquid temperatures for transitional region flow, (NRe > 2000)
10 ft/sec, 1 in tube (3.048 m/s, 2.54 cm tube)-16°C (4°F)
20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube)-24°C (12°F)
Coefficient of thermal expansion at 200°C0.000946/°C (0.000525/°F)
Heat of vaporization at max. use temperature227 kJ/kg (97.5 Btu/lb)
Kinematic viscosity at 100°C (ASTM D-445)1.44 mm2/s (cSt)
Kinematic viscosity at 40°C (ASTM D-445)4.00 mm2/s (cSt)
Liquid density at 15°C (ASTM D-4052)978 kg/m3 (8.16 lb/gal)
Liquid density at 25°C (ASTM D-4052)971 kg/m3 (8.10 lb/gal)
Total acidity (ASTM D-664)<0.2 mg KOH/g
Average molecular weight207
Pseudocritical temperature514°C (957°F)
Pseudocritical pressure22.3 bar (323 psia)
Pseudocritical density287 kg/m3 (17.9 lb/ft3)
Copper corrosion (ASTM D-130)<< 1a
Moisture content, maximum (ASTM E-203)200 ppm
Dielectric constant @ 23°C (ASTM D-924)2.52
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.

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