Dowtherm A
Physical properties of Dowtherm A heat transfer fluid. DOWTHERM™ A is a eutectic mixture of biphenyl and diphenyl oxide, suitable for non-pressurized liquid phase systems with a maximum temperature of 550 °F (288 °C).
Dowtherm A Properties
DOWTHERM™ A is a eutectic mixture of:
- Biphenyl (C₁₂H₁₀)
- Diphenyl oxide (C₁₂H₁₀O)
Operating Range
- Liquid phase: 15 °C to 400 °C (60 °F to 750 °F)
- Vapor phase: 257 °C to 400 °C (495 °F to 750 °F)
Key Physical Properties
- Freeze point: 12 °C (56.6 °F)
- Boiling point (atmospheric): 257 °C (494.8 °F)
- Flash point (SETA): 113 °C (236 °F)
- Fire point (C.O.C): 118 °C (245 °F)
- Autoignition temperature: 599 °C (1110 °F)
- Density (at 25 °C/75 °F): 1056 kg/m³ (66 lb/ft³)