Diphenyl ((C6H5)2) is a white crystalline solid insoluble in water. It is obtained from benzene or toluene and is extremely toxic. Its main usage is as one of the components of heat-transfer fluids capable of operating at temperatures around 700 K.
Below are some of its physical characteristics:
|Molecular weight: 154.21||Critical temperature: 789 K|
|Melting point:342.4 K||Critical pressure: 3.85 MPa|
|Normal boiling point: 528.4 K||Critical density: 323 kg/m3|