Trichloromethane sulfenyl chloride
Trichloromethane sulfenyl chloride or perchloromethyl mercaptan is the organosulfur compound with the formula Cl3C−S−Cl. It is mainly used as an intermediate for the synthesis of dyes and fungicides (captan, folpet).
Source: Wikipedia — Trichloromethane sulfenyl chloride (CC BY-SA 4.0)