Dimethyl trithiocarbonate is an organic compound with the chemical formula S=C(SCH3)2.

Dimethyl trithiocarbonate is a yellow liquid with a strong and unpleasant odor.

One synthesis starts from thiophosgene as described in this simplified equation:[4] Alternatively, it can be prepared by treating carbon disulfide with aqueous base, a phase-transfer catalyst, and methyl iodide.

[5] Dimethyl trithiocarbonate is used in preparation of methyl-β,β′-dicarbonyldithiocarboxylate derivatives,[clarification needed] in generation of tris(organothiyl)methyl radicals (RS)3C•,[why?]

[clarification needed][2] Dimethyl trithiocarbonate is also a useful reagent in the preparation of 2-mercaptoquinoline and its analogues which are potential antileishmanial agents.