Thioacetic acid

Thioacetic acid is an organosulfur compound with the molecular formula CH3C(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.

Thioacetic acid
Names
Preferred IUPAC name
Ethanethioic S-acid
Other names
Thioacetic S-acid
Thiolacetic acid
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.007.331
KEGG
UNII
  • InChI=1S/C2H4OS/c1-2(3)4/h1H3,(H,3,4) Y
    Key: DUYAAUVXQSMXQP-UHFFFAOYSA-N Y
  • InChI=1/C2H4OS/c1-2(3)4/h1H3,(H,3,4)
    Key: DUYAAUVXQSMXQP-UHFFFAOYAO
  • O=C(S)C
Properties
CH3C(O)SH
Molar mass 76.11756 g/mol
Appearance Transparent, colorless to light yellow liquid
Odor Unpleasant, strong thiol-like
Density 1.08 g/mL
Melting point −58 °C (−72 °F; 215 K)
Boiling point 93 °C (199 °F; 366 K)
−38.4·10−6 cm3/mol
1.465
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Severe skin burns and eye damage. Highly flammable.
GHS labelling:
Danger
H225, H301, H302, H314, H317
P210, P233, P240, P241, P242, P243, P260, P261, 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, P501
Lethal 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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Infobox references
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