Phenyl ether-biphenyl mixture

Phenyl ether-biphenyl mixture (CAS 8004-13-5), commercially known as Dowtherm A or Diphyl, is a eutectic blend of diphenyl oxide and biphenyl engineered for high-temperature heat transfer.

Where is Phenyl ether-biphenyl mixture used?

• Chemical processing: indirect heating systems
• Jacketed reactors, reboilers and distillation columns: precise thermal control without pressurized steam infrastructure
• Petrochemical and refining: working fluid
• Vapor-phase heating loops: uniform, high-temperature heat distribution
• Specialty chemical and pharmaceutical manufacturing: temperature-controlled synthesis reactions above 200°C
• It also serves as a process solvent and carrier in select high-boiling applications.

Good to know: Buyers should verify purity, boiling range and thermal stability against established heat transfer fluid standards.

Commercial specifications

• Bulk quantities: ISO tank, drum and IBC formats
• Specifications aligned to heat transfer fluid standards covering purity, boiling range and thermal stability