Applications
Diphenyl ether is widely used as a heat transfer agent and a dye carrier. It is employed as a processing aid in the production of polyesters. It acts as a chemical intermediate in the production of surface active agents and high temperature lubricants, fire retardants like polybrominated diphenyl ethers (PBDEs) and fragrance for detergents. It plays a vital role in the Ferrario reaction to produce phenoxathiin, which finds application in polyamide and polyimide production.

Solubility
Soluble in alcohol, chloroform, ethyl acetate, benzene, diethyl ether and glacial acetic acid. Insoluble in water.

Notes
Incompatible with strong oxidizing agents.