Thiocarbonic acid

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Thiocarbonic acid
Trithiocarbonic acid.svg
CAS number 594-08-1 YesY
PubChem 68982
Jmol-3D images Image 1
Molecular formula CH2S3
Molar mass 110.22 g/mol
Appearance red, oily liquid
Density 1.483 g/cm3(liquid)
Melting point 246.3K
Boiling point 331K
Related compounds
Related compounds Carbonic acidThiosulfuric acid
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references
Physical properties of thiocarbonic acid

Thiocarbonic acid is an inorganic acid which is related to carbonic acid. Its chemical formula is H2CS3.

It can be synthesized through the reaction of hydrosulfide and carbon disulfide:

CS2 + SH → S2CSH
S2CSH + OH → CS32− + H2O[1]

Thiocarbonic acid decomposes when heated:

H2CS3 → CS2 + H2S (g)


  1. ^ (simplified Chinese)《无机化学丛书》(张青莲 主编).第三卷 碳硅锗分族.4.3.2 二硫化碳及有关化合物.P97