Difference between revisions of "Potassium peroxymonosulfate"

Revision as of 16:26, 20 December 2016

Potassium peroxymonosulfate

Store grade Oxone on a watch glass.
Names
IUPAC name Potassium peroxymonosulfate
Other names Potassium monopersulfate Oxone Caroat MPS
Properties
Chemical formula	KHSO5 2KHSO5·KHSO4·K2SO4 (Oxone)
Molar mass	152.2 g/mol (614.76 as triple salt)
Appearance	White
Density	2.17 g/cm3
Solubility in water	Decomposes
Hazards
Safety data sheet	ScienceLab
Related compounds
Related compounds	Potassium persulfate Potassium pyrosulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Potassium peroxymonosulfate, also known potassium monopersulfate or MPS, is the potassium acid salt of peroxymonosulfuric acid, with the chemical formula KHSO₅. It is sold under the trade names Caroat and Oxone, where it exists as a mixture consisting of of 2KHSO₅·KHSO₄·K₂SO₄, as pure potassium peroxymonosulfate is unstable and breaks down in the latter two.

Properties

Chemical

Potassium peroxymonosulfate is a strong oxidizer, capable of oxidizing organic substances into various compounds, such as: aldehydes to carboxylic acids, alcoholic solvents to their coresponding esters, cleaving internal alkenes to two carboxylic acids and terminal alkenes to epoxides, ketones to dioxiranes, thioethers to sulfones, tertiary amines to amine oxides and phosphines to phosphine oxides.

Physical

Oxone is a white granular solid, with a weak bleach-like smell, that decomposes in the presence of water.

Availability

Potassium peroxymonosulfate is sold under the name of Oxone in most swimming pool stores and various home-improvement and gardening retailer stores.

Preparation

Potassium peroxymonosulfate can be prepared by reacting a concentrated solution of Caro's acid with a potassium salt, such as potassium carbonate. Potassium hydroxide can also be used.^[1]

It can also be obtained via electrolysis of potassium persulfate in sulfuric acid. Potassium sulfate appears as a byproduct.^[2]

Adding hydrogen peroxide to potassium persulfate also yields potassium peroxymonosulfate.^[3]

Another method involves the hydrolysis of sodium persulfate at 100 °C to yield peroxydisulfuric acid. Solid potassium bisulfite is added, and the solution is filtered to remove the resulting potassium sulfate. The filtrate is freeze-dried and then washed with distilled water and filtered again at room temperature. The resulting filtrate is chilled on an ice bath, and the product is recrystallized for better purity.^[4]

Projects

• Oxidize organic compounds

Handling

Safety

Potassium peroxymonosulfate is a strong oxidizer and should be kept away from any reducing agents or organic compounds.

Storage

Oxone should be kept in closed plastic or glass containers, away from any combustible materials.

Disposal

Can be neutralized with water and an alkali and poured down the drain.

References

1. ↑ http://www.google.com/patents/US4610865
2. ↑ "Thomas Slater Price, J. Chem. Soc., Trans., 1906, vol 89, p 56". 
3. ↑ Klemenc, A.; Zeitschrift fuer Physikalische Chemie, Abteilung A: Chemische Thermodynamik, Kinetik, Elektrochemie, Eigenschaftslehre; vol. 185; (1939); p. 1 - 36
4. ↑ "Price, J. S.; Tasker, I. R.; Appelman, E. H.; O'Hare, P. A. G.; Journal of Chemical Thermodynamics; vol. 18; nb. 10; (1986); p. 923 - 930". 

Relevant Sciencemadness threads

• Potassium peroxymonosulfate
• Oxone® triple salt: Separation into its components?, Reaction with copper?
• Why is oxone so cheap?
• Inorganic reactions with oxone(monoperoxysulfate)
• reaction with Potassium Peroxymonosulfate (oxone)