Potassium perchlorate

Jump to navigation Jump to search
Template:Chembox ECNumberTemplate:Chembox E numberTemplate:Chembox RTECSTemplate:Chembox UNNumberTemplate:Chembox AppearanceTemplate:Chembox DensityTemplate:Chembox MeltingPtTemplate:Chembox SolubilityInWaterTemplate:Chembox SolubilityProductTemplate:Chembox SolubilityTemplate:Chembox SolubilityTemplate:Chembox SolubilityTemplate:Chembox SolubilityTemplate:Chembox RefractIndexTemplate:Chembox StructureTemplate:Chembox ThermochemistryTemplate:Chembox GHSPictogramsTemplate:Chembox GHSSignalWordTemplate:Chembox HPhrasesTemplate:Chembox PPhrasesTemplate:Chembox NFPATemplate:Chembox OtherAnionsTemplate:Chembox OtherCations
Potassium perchlorate
Potassium perchlorate.png
Template:Chembox image sbs cell
Other names
Potassium chlorate(VII); Perchloric acid, potassium salt; peroidin
3D model (JSmol)
ECHA InfoCard Lua error in Module:Wikidata at line 879: attempt to index field 'wikibase' (a nil value). Lua error in Module:Wikidata at line 879: attempt to index field 'wikibase' (a nil value).
Molar mass 138.54 g·mol−1
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is ☑Y☒N ?)
Infobox references

WikiDoc Resources for Potassium perchlorate


Most recent articles on Potassium perchlorate

Most cited articles on Potassium perchlorate

Review articles on Potassium perchlorate

Articles on Potassium perchlorate in N Eng J Med, Lancet, BMJ


Powerpoint slides on Potassium perchlorate

Images of Potassium perchlorate

Photos of Potassium perchlorate

Podcasts & MP3s on Potassium perchlorate

Videos on Potassium perchlorate

Evidence Based Medicine

Cochrane Collaboration on Potassium perchlorate

Bandolier on Potassium perchlorate

TRIP on Potassium perchlorate

Clinical Trials

Ongoing Trials on Potassium perchlorate at Clinical Trials.gov

Trial results on Potassium perchlorate

Clinical Trials on Potassium perchlorate at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Potassium perchlorate

NICE Guidance on Potassium perchlorate


FDA on Potassium perchlorate

CDC on Potassium perchlorate


Books on Potassium perchlorate


Potassium perchlorate in the news

Be alerted to news on Potassium perchlorate

News trends on Potassium perchlorate


Blogs on Potassium perchlorate


Definitions of Potassium perchlorate

Patient Resources / Community

Patient resources on Potassium perchlorate

Discussion groups on Potassium perchlorate

Patient Handouts on Potassium perchlorate

Directions to Hospitals Treating Potassium perchlorate

Risk calculators and risk factors for Potassium perchlorate

Healthcare Provider Resources

Symptoms of Potassium perchlorate

Causes & Risk Factors for Potassium perchlorate

Diagnostic studies for Potassium perchlorate

Treatment of Potassium perchlorate

Continuing Medical Education (CME)

CME Programs on Potassium perchlorate


Potassium perchlorate en Espanol

Potassium perchlorate en Francais


Potassium perchlorate in the Marketplace

Patents on Potassium perchlorate

Experimental / Informatics

List of terms related to Potassium perchlorate

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Potassium perchlorate is the inorganic salt with the chemical formula KClO4. Like other perchlorates, this salt is a strong oxidizer although it usually reacts very slowly with organic substances. This usually obtained as a colorless, crystalline solid is a common oxidizer used in fireworks, ammunition percussion caps, explosive primers, and is used variously in propellants, flash compositions, stars, and sparklers. It has been used as a solid rocket propellant, although in that application it has mostly been replaced by the higher performance ammonium perchlorate. KClO4 has the lowest solubility of the alkali metal perchlorates (1.5 g in 100 mL of water at 25 °C).[1]


File:Perclorato de Potássio.jpg
Potassium perchlorate in crystal form

KClO4 is prepared industrially by treating an aqueous solution of sodium perchlorate with KCl. This single precipitation reaction exploits the low solubility of KClO4, which is about 100 times less than the solubility of NaClO4 (209.6 g/100 mL at 25 °C).[6] It can also be produced by the reaction of perchloric acid with potassium hydroxide, however this is not used widely, due to the dangers of perchloric acid.

Oxidizing properties

KClO4 is an oxidizer in the sense that it exothermically transfers oxygen to combustible materials, greatly increasing their rate of combustion relative to that in air. Thus, with glucose it gives carbon dioxide:

3 KClO4 + C6H12O6 → 6 H2O + 6 CO2 + 3 KCl

The conversion of solid glucose into hot gaseous CO2 is the basis of the explosive force of this and other such mixtures. Even with cane sugar, KClO4 yields a low explosive, provided the necessary confinement. Otherwise such mixtures simply deflagrate with an intense purple flame characteristic of potassium. Flash compositions used in firecrackers usually consist of fine aluminium powder mixed with potassium perchlorate.

As an oxidizer, potassium perchlorate can be used safely in the presence of sulfur, whereas potassium chlorate cannot. The greater reactivity of chlorate is typical – perchlorates are kinetically poorer oxidants. Chlorate produces chloric acid, which is highly unstable and can lead to premature ignition of the composition. Correspondingly, perchloric acid is quite stable.[7]

In medicine

Potassium perchlorate can be used as an antithyroid agent used to treat hyperthyroidism, usually in combination with one other medication. This application exploits the similar ionic radii and hydrophilicity of perchlorate and iodide.

Other Uses

Since 2005, a cartridge with potassium perchlorate mixed with anthracene and sulfur is used for generating the black smoke signalling the failure of reaching a two-thirds majority needed for the election of new pope by a papal conclave.


  1. 1.0 1.1 "Potassium Perchlorate MSDS". J.T. Baker. 2007-02-16. Retrieved 2007-12-10.
  2. 2.0 2.1 2.2 2.3 http://chemister.ru/Database/properties-en.php?dbid=1&id=519
  3. http://www.solubilityofthings.com/water/ions_solubility/ksp_chart.php
  4. Benenson, Walter; Stöcker, Horst. Handbook of Physics. Springer. p. 780. ISBN 0387952691. |access-date= requires |url= (help)
  5. 5.0 5.1 5.2 5.3 Sigma-Aldrich Co., Potassium perchlorate. Retrieved on 2014-05-27.
  6. Helmut Vogt, Jan Balej, John E. Bennett, Peter Wintzer, Saeed Akbar Sheikh, Patrizio Gallone "Chlorine Oxides and Chlorine Oxygen Acids" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a06_483
  7. Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.

External links

Template:Thyroid therapy