N-Methyl-2-thiazolidinethione is the organosulfur compound with the formula C2H4S(NCH3)CS.

It is classified as a heterocycle called a thiazolidine.

It is a colorless or off-white solid.

It has gained attention as a proposed low toxicity replacement for ethylenethioureas, which are used as accelerators for the vulcanization of chloroprene rubbers.

[1] The compound is prepared by reaction of N-methylethanolamine and carbon disulfide.