Calcium permanganate
Names
IUPAC name
Calcium dipermanganate[1]
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.280 Edit this at Wikidata
EC Number
  • 233-322-7
RTECS number
  • EW3860000
UNII
  • InChI=1S/Ca.2Mn.8O/q+2;;;;;;;;;2*-1 checkY
    Key: HYSMCTNXSYZEHS-UHFFFAOYSA-N checkY
  • InChI=1/Ca.2Mn.8O/q+2;;;;;;;;;2*-1/rCa.2MnO4/c;2*2-1(3,4)5/q+2;2*-1
    Key: HYSMCTNXSYZEHS-KTXORSEZAZ
  • [Ca+2].O=[Mn](=O)(=O)[O-].[O-] [Mn](=O)(=O)=O
Properties
Ca(MnO4)2
Molar mass 277.9493 g/mol
Appearance purple crystals
deliquesent
Density 2.49 g/cm3
Melting point 140 °C (284 °F; 413 K) (decomposes, tetrahydrate)
tetrahydrate:
331 g/100 mL (14 °C)
338 g/100 mL (25 °C)
Solubility soluble in ammonium hydroxide
decomposes in alcohol
Related compounds
Other cations
 Sodium permanganate
Ammonium permanganate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Calcium permanganate is an oxidizing agent and chemical compound with the chemical formula Ca(MnO4)2. This salt consists of the metal calcium and two permanganate ions.

Preparation

The salt is prepared from the reaction of potassium permanganate with calcium chloride[2] or from the reaction of aluminium permanganate with calcium oxide. It can also be prepared by reacting manganese dioxide with a solution of calcium hypochlorite and a little bit of calcium hydroxide to increase the pH level.[citation needed]

Uses

Calcium permanganate is used in the textile industry, for sterilization of water, and as a deodorizer.[2] It is believed to help whiten teeth.[3] It was formerly used as a component of rocket fuel by the Luftwaffe.[4]

Safety

It is noncombustible, but being a strong oxidizing agent, it will accelerate the burning of combustible material. If the combustible material is finely divided, the resulting mixture may be explosive. Contact with liquid combustible materials may result in spontaneous ignition. Contact with sulfuric acid may cause fires or explosions. Mixtures with acetic acid or acetic anhydride can explode if not kept cold. Explosions can occur when mixtures of calcium permanganate and sulfuric acid come into contact with benzene, carbon disulfide, diethyl ether, ethyl alcohol, petroleum, or other organic matter.[5]

See also

References

  1. ^ "CALCIUM PERMANGANATE, CAS Number: 10118-76-0". Archived from the original on 2017-12-22. Retrieved 2009-03-11.
  2. ^ a b Perry, Dale L. (2011). Handbook of Inorganic Compounds (2nd ed.). Boca Raton: Taylor & Francis. pp. 94–95. ISBN 978-1-4398-1461-1.
  3. ^ EP 1786352A1, "Permanganate containing whitening compositions and methods of their use", issued 2005-08-23 
  4. ^ Van Pelt, Michel (2012). Rocketing into the future : the history and technology of rocket planes. New York: Springer. p. 60. ISBN 978-1-4614-3200-5.
  5. ^ "Calcium permanganate Safety Data Sheet". www.echemi.com.


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