Thiosulfuric acid

Thiosulfuric acid

Chembox new
ImageFile = Thiosulfuric acid 2-D structure.png ImageSize = 150px
IUPACName = sulfurothioic O-acid
OtherNames = thiosulfuric acid dihydroxidooxidosulfidosulfur
Section1 = Chembox Identifiers
CASNo = 7772-98-7
PubChem =
SMILES =OS(=O)(=S)O
Section2 = Chembox Properties
Formula = H2S2O3
MolarMass = 114.14408
Appearance =
Density =
MeltingPt =
BoilingPt =
Solubility =decomposes

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.

ee also

*Sulfur oxoacids for other sulfur oxoacids

Footnotes

#Greenwood&Earnshaw


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Look at other dictionaries:

  • thiosulfuric acid — tiosulfato rūgštis statusas T sritis chemija formulė H₂S₂O₃ atitikmenys: angl. thiosulfuric acid rus. серноватистая кислота; тиосерная кислота ryšiai: sinonimas – vandenilio trioksotiosulfatas(2–) …   Chemijos terminų aiškinamasis žodynas

  • thiosulfuric acid — “+... noun Etymology: thiosulfuric from thi + sulfuric : an unstable acid H2S2O3 derived from sulfuric acid by replacement of one oxygen atom by sulfur and known only in solution or in the form of salts and esters * * * Chem. an acid, H2S2O3,… …   Useful english dictionary

  • thiosulfuric acid — Chem. an acid, H2S2O3, that may be regarded as sulfuric acid with one oxygen atom replaced by sulfur. [1870 75] * * * …   Universalium

  • thiosulfuric acid — noun An unstable acid, HSO, formally derived from sulfuric acid by the substitution of a sulfur atom for an oxygen one; it is known only in solution or as its salts and esters, the thiosulfates …   Wiktionary

  • thiosulfuric acid — thi′o•sul•fu′ric ac′id [[t]ˈθaɪ oʊ sʌlˈfyʊər ɪk, ˌθaɪ [/t]] n. chem. an acid, H2S2O3, derived from sulfuric acid • Etymology: 1870–75 …   From formal English to slang

  • thiosulfuric acid — H2S2O3; sulfuric acid in which an atom of oxygen has been replaced by one of sulfur. * * * thio·sul·fur·ic ac·id (thi″o səl fūrґik) the molecular species H2S2O3 …   Medical dictionary

  • thiosulfuric — /thuy oh sul fyoor ik/, adj. Chem. of or derived from thiosulfuric acid. [1870 75; THIO + SULFURIC] * * * …   Universalium

  • thiosulfuric — adjective Of or pertaining to thiosulfuric acid or its derivatives …   Wiktionary

  • thiosulfuric — /thuy oh sul fyoor ik/, adj. Chem. of or derived from thiosulfuric acid. [1870 75; THIO + SULFURIC] …   Useful english dictionary

  • thiosulfuric — thio·sul·fu·ric or chiefly Brit thio·sul·phu·ric .səl fyu̇(ə)r ik adj of, relating to, or being an unstable acid H2S2O3 derived from sulfuric acid by replacement of one oxygen atom by sulfur and known only in solution or in salts and esters …   Medical dictionary

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