Performance Benefits

  • Low Fouling - The chemical composition of Therminol XP has been carefully selected to minimize system fouling resulting from oxidation and degradation of the fluid.
  • Practically Non-Toxic - Meets the purity specifications in U.S. Food & Drug Administration Regulation 21 CFR 172.878. Listed as a Registered Nonfood Compound by NSF International (Category Code HT-1: Heat transfer fluids - Incidental contact).
  • Thermal Stability - Users can expect many years of reliable, trouble-free operation, even when operating Therminol XP continuously at the recommended maximum temperature of 315°C (600°F).
  • Environmentally Friendly - Therminol XP has outstanding regulatory status for those seeking heat transfer fluids which have minimum environmental reporting requirements.

Typical Properties

AppearanceColorless, odorless liquid
CompositionWhite mineral oil
Maximum bulk temperature315°C (600°F)
Maximum film temperature330°C (625°F)
Normal boiling point358°C (676°F)
Pumpability, at 300 mm2/s (cSt)-1°C (30°F)
Pumpability, at 2000 mm2/s (cSt)-20°C (-4°F)
Flash point, COC (ASTM D-92)199°C (390°F)
Autoignition temperature (ASTM E-659)346°C (655°F)
Autoignition temperature (DIN 51794)363°C (685°F)
Pour point (ISO 3016)-29°C (-20°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)72°C (162°F)
20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube)51°C (123°F)
Minimum liquid temperatures for transitional region flow, (NRe > 2000)
10 ft/sec, 1 in tube (3.048 m/s, 2.54 cm tube)30°C (85°F)
20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube)17°C (63°F)
Coefficient of thermal expansion at 200°C0.000892/°C (0.000495/°F)
Heat of vaporization at max. use temperature214.0 kJ/kg (91.9 Btu/lb)
Kinematic viscosity at 100°C (ASTM D-445)4.06 mm2/s (cSt)
Kinematic viscosity at 40°C (ASTM D-445)23.70 mm2/s (cSt)
Liquid density at 25°C (ASTM D-4052)875.0 kg/m3 (7.30 lb/gal)
Average molecular weight350
Pseudocritical temperature542°C (1007°F)
Pseudocritical pressure15.2 bar (220.0 psia)
Pseudocritical density280 kg/m3 (17.5 lb/ft3)
Dielectric constant @ 23°C (ASTM D-924)2.14
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.