Topic summary
Thioacetic acid

Ethanethioic S-acid
Thioacetic S-acid
Thiolacetic acid
Thiolacetic acid
3D model (JSmol)
PubChemCID
CompTox Dashboard(EPA)
- InChI=1S/C2H4OS/c1-2(3)4/h1H3,(H,3,4)Key: DUYAAUVXQSMXQP-UHFFFAOYSA-N
- InChI=1/C2H4OS/c1-2(3)4/h1H3,(H,3,4)Key: DUYAAUVXQSMXQP-UHFFFAOYAO
- O=C(S)C
Refractive index (nD)
Main hazards
LD50 (median dose)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Thioacetic acid is an organosulfur compound with the molecular formulaCH3C(O)SH. It is a thioic acid: the sulfur analogue of acetic acid (CH3C(O)OH), as implied by the thio- prefix. It is a yellow liquid with a strong thiol-like odor. It is used in organic synthesis for the introduction of thiol groups (−SH) in molecules.