Potassium peroxymonosulfate

"Oxone" redirects here. Not to be confused with the gas ozone.
Not to be confused with Potassium persulfate.
Potassium peroxymonosulfate
Names
IUPAC name
Potassium peroxysulfate
Other names
Caroat
potassium monopersulfate
MPS
KMPS
potassium caroate
non-chlorine shock[1]
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 ☒N
    Key: OKBMCNHOEMXPTM-UHFFFAOYSA-M ☒N
  • 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 (614.76 g/mol as triple salt)
Appearance Off-white powder
Decomposes
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Oxidant, corrosive
NFPA 704 (fire diamond)
[2]
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) Degussa Caroat MSDS
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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Potassium peroxymonosulfate is widely used as an oxidizing agent, for example, in pools and spas (usually referred to as monopersulfate or "MPS"). It is the potassium salt of peroxymonosulfuric acid. Potassium peroxymonosulfate per se is rarely encountered. It is often confused with the triple salt 2KHSO5·KHSO4·K2SO4, known as Oxone.

The standard electrode potential for potassium peroxymonosulfate is +1.81 V with a half reaction generating the hydrogen sulfate (pH = 0):[3]

HSO−5 + 2H+ + 2e− → HSO−4 + H2O
  1. ^ Wu, Mingsong; Xu, Xinyang; Xu, Xun (November 2014). "Algicidal and Bactericidal Effect of Potassium Monopersulfate Compound on Eutrophic Water". Applied Mechanics and Materials. 707: 259. doi:10.4028/www.scientific.net/AMM.707.259. S2CID 98000605.
  2. ^ "DuPont MSDS" (PDF). Archived from the original (PDF) on 2014-08-15. Retrieved 2012-01-26.
  3. ^ Spiro, M. (1979). "The standard potential of the peroxosulphate/sulphate couple". Electrochimica Acta. 24 (3): 313–314. doi:10.1016/0013-4686(79)85051-3. ISSN 0013-4686.