Thiosulfuric acid
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| Thiosulfuric acid | |
|---|---|
| Image:Thiosulfuric acid 2-D structure.png | |
| IUPAC name | sulfurothioic O-acid |
| Other names | thiosulfuric acid dihydroxidooxidosulfidosulfur |
| Identifiers | |
| CAS number | |
| SMILES | OS(=O)(=S)O |
| Properties | |
| Molecular formula | H2S2O3 |
| Molar mass | 114.14408 |
| Solubility in water | decomposes |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references | |
Thiosulfuric acid is a sulfur oxoacid. The acid cannot be made by acidifying thiosulfate salts as the acid readily decomposes in water. The decomposition products can include, depending on the exact reaction conditions, sulfur, sulfur dioxide, hydrogen sulfide, polysulfanes, sulfuric acid and polythionates. Anhydrous methods of producing the acid include:
- (in diethyl ether at -78°C )
- H2S + SO3 → H2S2O3•nEt2O
- Na2S2O3+2HCl → 2NaCl + H2S2O3•2Et2O
The anhydrous acid decomposes below 0°C :
- H2S2O3 → H2S + SO3
There is an isomeric form, a white crystalline adduct, H2S.SO3 which can be prepared at low temperature.
See also
- sulfur oxoacids for other sulfur oxoacids
Footnotes
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
