Diphenyl ether
CAS 101-84-8
Sometimes the best high-temperature fluid is not a new molecule, but two old molecules mixed at the right composition.
Diphenyl ether is a component of classic diphenyl ether-biphenyl heat-transfer fluids. Aromatic structure provides useful high-temperature stability, while the eutectic mixture melts below either pure component, widening the liquid operating range. The engineering lesson is simple: a carefully chosen mixture can outperform either pure substance by changing phase behavior rather than molecular identity.
Published:
2026-09-10
