Potassium peroxymonosulfate

Chemical compound From Wikipedia, the free encyclopedia

Potassium peroxymonosulfate, also referred to as potassium peroxysulfate and potassium monopersulfate (KMPS), is an inorganic compound with the formula KHSO5. It is the mono-potassium salt derived from peroxymonosulfuric acid (Caro's acid). It is a constituent of the widely used oxidizing agent called Oxone, which is a triple salt with the formula 2KHSO5·KHSO4·K2SO4.[2][3][4]

Quick facts Names, Identifiers ...
Potassium peroxymonosulfate
Names
IUPAC name
Potassium peroxysulfate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.158 Edit this at Wikidata
UNII
  • InChI=1S/K.H2O5S/c;1-5-6(2,3)4/h;1H,(H,2,3,4)/q+1;/p-1 X markN
    Key: OKBMCNHOEMXPTM-UHFFFAOYSA-M X markN
  • InChI=1S/K.H2O4S/c;1-4-5(2)3/h;1H,(H,2,3)/q+1;/p-1
  • Key: GZHFEBOLZPYNER-UHFFFAOYSA-M
  • InChI=1/K.H2O5S/c;1-5-6(2,3)4/h;1H,(H,2,3,4)/q+1;/p-1
    Key: OKBMCNHOEMXPTM-REWHXWOFAJ
  • [K+].[O-]S(=O)(=O)OO
Properties
KHSO5
Molar mass 152.2 g/mol
Appearance white solid
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Oxidant, corrosive
NFPA 704 (fire diamond)
[1]
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
3
0
1
Safety data sheet (SDS) ChemicalBook.com SDS[1]
Related compounds
Related compounds
 Potassium persulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Related salts

Organic-soluble derivatives of peroxymonosulfate include the tetra-n-butylammonium, tetraphenylphosphonium, and benzyltriphenylphosphonium salts: (nBu4N)HSO5, (Ph4P)HSO5, and (BnPh3P)HSO5.[5][6] The ammonium and sodium salts of HSO−5 are also known.

Applications

The title compound is the active ingredient in oxone, which is a common disinfectant[7] and whitening agent.[2] It has also been investigated for use in processes aimed at delignification of wood.[8]

Underlying these uses is the high redox potential, which for potassium peroxymonosulfate, per se, is +1.81 V.

Structure

The structure of the monohydrate has been confirmed by X-ray crystallography. This analysis reveals the expected tetrahedral sulfur center, an O-O bond length of 146 picometers, and an SOOH dihedral angle of 90°.[9]


References

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