Phenyl ether-biphenyl eutectic Dowtherm A,Heat Transfer Fluid Phenyl ether-biphenyl eutectic Other name: Biphenyl, ... ),biphenyl-diphenyl ether mixture(26.5:73.5),Dowtherm A,DIPHYL,DOWTHERM(R) A CAS No: 8004-13-5Chemical formula: C24H20OEINECS No ... . Products Specialty:Phenyl ether-biphenyl eutectic heat transfer fluid is a eutectic mixture of two very stable compounds, biphenyl (C12H10) and ...