DOWTHERM A is a heat transfer fluid made of a mixture of biphenyl and diphenyl oxide. It can be used for both liquid phase and vapor phase heating in the temperature range of 15-400°C for liquid and 257-400°C for vapor. It has good thermal stability and leaves no residue during use. Typical properties including composition, freezing point, boiling point, density and heat capacity are provided.
DOWTHERM A is a heat transfer fluid made of a mixture of biphenyl and diphenyl oxide. It can be used for both liquid phase and vapor phase heating in the temperature range of 15-400°C for liquid and 257-400°C for vapor. It has good thermal stability and leaves no residue during use. Typical properties including composition, freezing point, boiling point, density and heat capacity are provided.
DOWTHERM A is a heat transfer fluid made of a mixture of biphenyl and diphenyl oxide. It can be used for both liquid phase and vapor phase heating in the temperature range of 15-400°C for liquid and 257-400°C for vapor. It has good thermal stability and leaves no residue during use. Typical properties including composition, freezing point, boiling point, density and heat capacity are provided.
DOWTHERM A is a heat transfer fluid made of a mixture of biphenyl and diphenyl oxide. It can be used for both liquid phase and vapor phase heating in the temperature range of 15-400°C for liquid and 257-400°C for vapor. It has good thermal stability and leaves no residue during use. Typical properties including composition, freezing point, boiling point, density and heat capacity are provided.
DOWTHERM A Synthetic Organic Heat Transfer Fluid Liquid and Vapor Phase Data
DOWTHERM* A heat transfer fluid is Typical Properties of DOWTHERM A Fluid
a eutectic mixture of two very stable Composition: Diphenyl Oxide/Biphenyl Blend compounds, biphenyl (C12H10) and diphenyl oxide (C12H10O). These Color: Clear to Light Yellow compounds have practically the same Property SI Units English Units vapor pressures, so the mixture can be handled as if it were a single Freeze Point 12.0C 53.6F Atmospheric Boiling Point 257.1C 494.8F compound. DOWTHERM A fluid may be used in systems employing either Flash Point1 113C 236F liquid phase or vapor phase heating. Fire Point2 118C 245F Autoignition Temperature3 599C 1110F Recommended use temperature range: Density @ 25C (75F) 1056 kg/m3 66.0 lb/ft3 Liquid phase: 15C (60F) to Surface Tension in Air @ 400C (750F) 20C (68F) 40.1 Dynes/cm 40.1 Dynes/cm Vapor phase: 257C (495F) to 40C (104F) 37.6 Dynes/cm 37.6 Dynes/cm 400C (750F) 60C (140F) 35.7 Dynes/cm 35.7 Dynes/cm Estimated Critical Temperature 497C 927F Suitable applications: Indirect heat Estimated Critical Pressure 31.34 bar 30.93 atm transfer Estimated Critical Volume 3.17 l/kg 0.0508 ft3/lb Average Molecular Weight 166.0 For health and safety information for this Heat of Combustion 36,053 kJ/kg 15,500 Btu/lb
Not to be construed as specifications product, contact your Dow sales repre- 1 SETA 2 sentative or call the number for your 3 C.O.C. ASTM E659-78 area on the second page of this sheet for a Material Safety Data Sheet (MSDS).
Saturated Liquid Properties of Saturated Liquid Properties of
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Published November 2001
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Printed in U.S.A. *Trademark of The Dow Chemical Company NA/LA/Pacific: Form No. 176-01463-1101 AMS Europe: CH-153-307-E-1101
