Performance Benefits

  • Easy to Handle – Therminol VP-3 has a normal boiling point of 243°C (469°F), 14°C (26°F) below the normal boiling point of Therminol VP-1. Laboratory thermal stability testing suggests a maximum continuous operating temperature of 330°C (625°F) in the liquid or vapor phase. A crystallization point of 2°C (36°F) makes Therminol VP-3 easy to handle and may eliminate the need for costly heat tracing in moderate climates.
  • Low Odor - The odor of Therminol VP-3 is milder than other vapor phase organic heat transfer fluids. Therminol VP-3 is a mixture of phenylcyclohexane and bicyclohexyl. It contains virtually no biphenyl.
  • Class III b Combustibility – With an open cup flash point of 104°C (219°F), Therminol VP-3 is a Class III b combustible fluid under the definitions of the NFPA (U.S. National Fire Prevention Association). As with any other combustible material, proper system design and operation are important to safe operation. Leaks of vapor could condense into a stable mist suspension that may be explosive in certain concentrations in air.

Typical Properties

AppearanceAbove 2.4°C (36°F) clear, sediment-free liquid
CompositionPhenylcyclohexane + bicyclohexyl
Maximum bulk temperature330°C (625°F)
Maximum film temperature360°C (675°F)
Normal boiling point243°C (469°F)
Crystallizing point2.4°C (36°F)
Flash point, COC (ASTM D-92)104°C (219°F)
Autoignition temperature (ASTM E-659)360°C (680°F)
Autoignition temperature (DIN 51794)351°C (664°F)
Coefficient of thermal expansion at 200°C0.001204/°C (0.000669/°F)
Kinematic viscosity at 40°C (ASTM D-445)2.04 mm2/s (cSt)
Liquid density at 15°C (ASTM D-4052)935.0 kg/m3 (7.80 lb/gal)
Liquid density at 25°C (ASTM D-4052)930.0 kg/m3 (7.76 lb/gal)
Total acidity (ASTM D-664)<0.2 mg KOH/g
Average molecular weight161
Pseudocritical temperature406°C (764°F)
Pseudocritical pressure38.5 bar (558.4 psia)
Pseudocritical density352 kg/m3 (22 lb/ft3)
Copper corrosion (ASTM D-130)<< 1a
Moisture content, maximum (ASTM E-203)150 ppm
Surface tension in air at 25°C43.2 dynes/cm
Dielectric constant @ 23°C (ASTM D-924)2.48
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.