In organic and organometallic chemistry, trisulfide is the functional group R-S-S-S-R.

Examples include: Diallyl trisulfide Dimethyl trisulfide Trisulfane (hydrogen trisulfide)

Some inorganic compounds are also named trisulfides to reflect their stoichiometry.

Examples include:

Antimony trisulfide Arsenic trisulfide Bismuth trisulfide Diboron trisulfide Diiron trisulfide Molybdenum trisulfide Phosphorus trisulfide

See also Chalcogenide Triselenide Disulfide Polysulfide