phenyl ether[′fen·əl ′eth·ər]
diphenyl oxide, an aromatic ether, C6H3—O—C6H6; colorless crystals with an odor of geraniums. Melting point, 26°-27°C; boiling point, 259°C. It is insoluble in water but soluble in organic solvents. It is made industrially by heating chlorobenzene with potassium phenate in the presence of copper powder at 210°C.
Phenyl ether is used in perfume products and as a soap odorant. Mixed with biphenyl (26.5 percent), it is used as a high-temperature heat carrier under the name Dowtherm.