Peroxydisulfuric acid

Peroxydisulfuric acid
Peroxydisulfuric acid
CAS number 13445-49-3 YesY
PubChem 24413
ChemSpider 22822 YesY
ChEBI CHEBI:29268 YesY
Jmol-3D images Image 1
Molecular formula H2O8S2
Molar mass 194.14 g mol−1
Appearance Colourless solid
Melting point

65 °C, 338 K, 149 °F (Decomposes)

Solubility in water soluble
Related compounds
Other cations Potassium persulfate
Sodium persulfate
Ammonium persulfate
Related compounds Peroxymonosulfuric acid
Pyrosulfuric acid
 YesY acid (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Peroxydisulfuric acid is a sulfur oxoacid with the chemical formula H2S2O8.[1] It is also called Marshall's acid. In structural terms it can be written HO3SOOSO3H. It contains sulfur in its +6 oxidation state, but it also contains peroxide ions, which is why it appears to be in a higher oxidation state then sulfates. Its salts, commonly known as persulfates, are industrially important but the acid itself is not. The salts contain the peroxydisulfate ion. They are powerful oxidizing agents.

See also

Made up of hydrogen peroxide and sulfur trioxide or by electrolysis of sulfuric acid


  1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Oxford: Butterworth-Heinemann. ISBN 0080379419. 

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Look at other dictionaries:

  • peroxydisulfuric acid — “+... noun Etymology: peroxy + disulfuric : persulfuric acid a * * * /peuh rok see duy sul fyoor ik, rok /, Chem. See persulfuric acid (def. 2). [PEROXY + DI 1 + SULFURIC ACID] …   Useful english dictionary

  • peroxydisulfuric acid — /peuh rok see duy sul fyoor ik, rok /, Chem. See persulfuric acid (def. 2). [PEROXY + DI 1 + SULFURIC ACID] * * * …   Universalium

  • peroxydisulfuric acid — per·oxy·di·sul·fu·ric acid pə .räk si .dī .səl .fyu̇r ik n PERSULFURIC ACID (a) …   Medical dictionary

  • persulfuric acid — |pər, |per+... noun Etymology: International Scientific Vocabulary per + sulfuric; probably originally formed as French persulphurique : either of two peroxy acids of sulfur: a. : a crystalline strongly oxidizing acid H2S2O8 obtained usually by… …   Useful english dictionary

  • Peroxymonosulfuric acid — Chembox new Name = Peroxymonosulfuric acid ImageFile = Peroxymonosulfuric acid.svg ImageFile1 = Caro s acid 3D balls.png ImageName1 = Ball and stick model of peroxymonosulfuric acid OtherNames = persulfuric acid, peroxysulfuric acid,… …   Wikipedia

  • Peroxy acid — A peroxy acid (often spelled as one word, peroxyacid, and sometimes called peracid) is an acid in which an acidic OH group has been replaced by an OOH group. They are formed chiefly by elements in groups 14, 15 and 16 of the periodic table,… …   Wikipedia

  • persulfuric acid — /perr sul fyoor ik, perr /, Chem. 1. Also called Caro s acid, permonosulfuric acid, peroxymonosulfuric acid, peroxysulfuric acid. a white, crystalline solid, H2SO5, used as an oxidizing agent for certain organic compounds. 2. Also called… …   Universalium

  • peroxydisulphuric acid — /pəˌrɒksidaɪsʌlˌfjurɪk ˈæsəd/ (say puh.rokseeduysul.fyoohrik asuhd) noun Chemistry → persulphuric acid (def. 2). Also, peroxydisulfuric acid …   Australian-English dictionary

  • Sulfur — This article is about the chemical element. For other uses, see Sulfur (disambiguation). phosphorus ← sulfur → chlorine …   Wikipedia

  • Dictionary of chemical formulas — This is a list of chemical compounds with chemical formulas and CAS numbers, indexed by formula. This complements alternative listings to be found at list of inorganic compounds, list of organic compounds and inorganic compounds by element. Table …   Wikipedia

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