Organic synthesis: 4,4′- bischloromethyl diphenyl produced with diphenyl as the basic raw material is an important intermediate for synthesizing high-end fluorescent whitening agents of the totuylene diphenyl type.
Electron chemistry: derivatives of M–Terphenyl are of favorable electron attraction and extremely low energy level of HOMO; therefore, they can easily block electron holes and are a good electron transport material.
Fine chemical engineering: under radiation, P–Terphenyl will generate fluorescence, and thus it can be used as an organic scintillation reagent. It is used as an illuminant in scintillation counters and as a synthetic intermediate for laser dyes.
Heat carrier: diphenyl oxide is a raw material used in the production of high-temperature heat transfer oils. Fine chemical engineering: diphenyl ether is called crystal geranium oil or artificial geranium oil in the perfume industry. Due to the alkaline stability of geranium oil, it is usually used for preparing essences for soaps.
Chemistry and chemical engineering: with a high boiling point, 1,2,3,4-tetrahydronaphthalene has low evaporation even at 180°C; therefore, it can be used as a high-boiling-point solvent, and can be used for producing lubricants and Alpha-Tetralone.