Thioacetone

Thioacetone
Names
	Preferred IUPAC name Propane-2-thione
	Systematic IUPAC name Thiopropan-2-one
	Other names Propanethione; Thiopropanone; Thioacetone; Dimethyl thioketone; Sulfocarbon dimethanide; (Dimethyl)methylene sulfide; Sulfoacetone; Sulfopropanone;
Identifiers
CAS Number	4756-05-2 monomer; 828-26-2 trimer;
3D model (JSmol)	Interactive image;
ChemSpider	557043;
PubChem CID	641811;
CompTox Dashboard (EPA)	DTXSID70963875 ;
	InChI InChI=1S/C3H6S/c1-3(2)4/h1-2H3 Key: JTNXQVCPQMQLHK-UHFFFAOYSA-N; InChI=1/C3H6S/c1-3(2)4/h1-2H3 Key: JTNXQVCPQMQLHK-UHFFFAOYAT;
	SMILES CC(=S)C;
Properties
Chemical formula	C3H6S
Molar mass	74.14 g·mol−1
Appearance	Orange to brown liquid
Odor	Extremely unpleasant; intensely sulfurous, leek-like
Melting point	−55°C(218.15k/-67°F)
Boiling point	70°C(343.15k/158°F)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Odor, skin irritant
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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.

Thioacetone was first obtained in 1889 by Baumann and Fromm, as a minor impurity in their synthesis of trithioacetone.