Chemical compound Thioacetone is an organosulfur compound belonging to the ‑thione group called thioketones with a chemical formula (CH3)2CS. It is an unstable orange or brown substance that can be isolated only at low temperatures. Above −20 °C (−4 °F), thioacetone readily converts to a polymer and a trimer, trithioacetone. It has an extremely potent, unpleasant odor, and is considered one of the worst-smelling substances known. 237,939 views on July 26, 2017 — Wikipedia's most-read article that day. Also most read: Dunkirk (2017 film), SEAL Team Six, Chester Bennington, Battle of Dunkirk. Wiki link