Diphenyl sulfide is an organosulfur compound with the chemical formula (C6H5)2S, often abbreviated as Ph2S, where Ph stands for phenyl.

The molecule consists of two phenyl groups attached to a sulfur atom.

[4] Diphenyl sulfide and its analogues can also be produced by coupling reactions using metal catalysts.

[6] Diphenyl sulfide is a product of the photodegradation of the fungicide edifenphos.

[7] Diphenyl sulfide is a precursor to triarylsulfonium salts, which are used as photoinitiators.