Thioformic acid

Thioformic acid is a chemical compound with the molecular formula CH₂OS. As the simplest thiocarboxylic acid,^[2] it has been the subject of studies on its properties which may be extrapolated to more complex thiocarboxylic acids.^[3][4][5]

Thioformic acid

Names
IUPAC name Methanethioic S-acid
Other names Monothioformic acid
Identifiers
CAS Number	16890-80-5
3D model (JSmol)	Interactive image Interactive image
ChemSpider	452997
PubChem CID	519335
CompTox Dashboard (EPA)	DTXSID30333974
InChI InChI=1S/CH2OS/c2-1-3/h1H,(H,2,3) Key: AWIJRPNMLHPLNC-UHFFFAOYSA-N
SMILES C(=O)S S=CO
Properties
Chemical formula	CH2OS
Molar mass	62.09 g·mol−1
Boiling point	86 °C (187 °F; 359 K)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Like other thiocarboxylic acids, thioformic acid can occur in either of two tautomers. The ratio of the two is dependent on solvent and other factors.^[6][7]

Thioformic acid has been detected in the interstellar medium near the giant molecular cloud G+0.693–0.027 and the hot core G31.41+0.31.^[2][5][8]