Topic summary

Thioacetic acid

Thioacetic acid
Names Preferred IUPAC name
Ethanethioic S-acid
Other names
Thioacetic S-acid
Thiolacetic acid
Identifiers
3D model (JSmol)
ChEBIChemSpiderECHA InfoCard100.007.331KEGGUNII
  • 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
Properties C2H4OSMolar mass76.11 g·mol Appearance Transparent, colorless to light yellow liquid OdorUnpleasant, strong thiol-like Density1.08 g/mL Melting point−58 °C (−72 °F; 215 K) Boiling point93 °C (199 °F; 366 K) −38.4·10 cm/mol 1.465 Hazards Occupational safety and health (OHS/OSH):
Main hazards
May cause severe skin and eye burns. Highly flammable liquid. GHS labelling: DangerH225, H301, H302, H314, H317P210, P233, P240, P241, P242, P243, P260, P264, P264+P265, P270, P272, P280, P301+P316, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P303+P361+P353, P304+P340, P305+P354+P338, P316, P317, P321, P330, P333+P317, P362+P364, P363, P370+P378, P403+P235, P405, P501Lethal dose or concentration (LD, LC): 75 mg/kg (mouse, intraperitoneal) Safety data sheet (SDS) Fischer Scientific
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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.