Calcium permanganate

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Calcium permanganate
Calcium permanganate.png
Names
IUPAC name
Calcium oxido-trioxo-manganese[1]
Identifiers
10118-76-0 YesY
ChemSpider 23333 YesY
EC number 233-322-7
Jmol-3D images Image
PubChem 24959
RTECS number EW3860000
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 noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY verify (what isYesY/N?)
Infobox references

Calcium permanganate is an oxidizing agent. It consists of the metal calcium and two permanganate ions. 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.

It is prepared from the reaction of potassium permanganate with calcium chloride or from the reaction of aluminum permanganate with calcium oxide.

Uses[edit]

It is believed to help whiten teeth.[2]

See also[edit]

References[edit]