Thiosulfuric acid
Thiosulfuric acid Basic information
- Product Name:
- Thiosulfuric acid
- Synonyms:
-
- Thiosulfuric acid
- sulfurothioic O-acid
- Thiosulfuric acid (H2S2O3) (9CI)
- Thiosulfuric acid (H2S2O3)
- CAS:
- 13686-28-7
- MF:
- H2O3S2
- MW:
- 114.15
- Mol File:
- 13686-28-7.mol
Thiosulfuric acid Chemical Properties
- Density
- 1.867±0.06 g/cm3(Predicted)
- pka
- -4.23±0.18(Predicted)
Thiosulfuric acid Usage And Synthesis
Physical properties
Thiosulfuric acid is a sulfur oxoacid. The free acid
cannot be prepared by acidifying thiosulfate salts
as the acid readily decomposes in water. Anhydrous methods of producing
the acid are:
H2S＋ SO3→H2S2O3·nEt2O (in diethyl ether at 78°C)
Na2S2O3＋2HCl/2NaCl＋H2S2O3·2Et2O
(in diethyl ether at 78°C)
HSO3Cl＋H2S→HCl＋H2S2O3 (low temperature)
The anhydrous acid also decomposes below 0°C:
H2S2O3→H2S＋ SO3
There is another isomeric form, a white crystalline
adduct of hydrogen sulfide and sulfur trioxide, H2S·SO3, which can also be prepared at low temperature.
Definition
ChEBI: Sulfurothioic S-acid is a thiosulfuric acid. It has a role as a mouse metabolite. It is a conjugate acid of a hydroxidodioxidosulfidosulfate(1-). It is a tautomer of a sulfurothioic O-acid.