Dimethylthiocarbamoyl chloride is an organosulfur compound with the formula (CH3)2NC(S)Cl.

It is a key reagent in the synthesis of arylthiols via the Newman-Kwart rearrangement.

[2] It is analogous to dimethylcarbamoyl chloride (R2NC(O)Cl).

Dimethylthiocarbamoyl chloride is prepared by chlorination of the related tetramethylthiuram disulfide: Dimethylthiocarbamoyl chloride reacts with dithiocarbamates (R2NCS−2) to give thiuram sulfides [R2NC(S)]2S.

With methanethiolate, it gives methyl dimethyldithiocarbamate (Me2NC(S)SMe).