Calcium permanganate

Calcium permanganate
IUPAC name Calcium oxido-trioxo-manganese[1]
Identifiers
CAS number	10118-76-0 Y
PubChem	24959
ChemSpider	23333 Y
EC number	233-322-7
RTECS number	EW3860000
Jmol-3D images	{{#if:[Ca+2].O=[Mn](=O)(=O)[O-].[O-][Mn](=O)(=O)=O|Image 1
SMILES [Ca+2].O=[Mn](=O)(=O)[O-].[O-][Mn](=O)(=O)=O
InChI InChI=1S/Ca.2Mn.8O/q+2;;;;;;;;;2*-1 Y Key: HYSMCTNXSYZEHS-UHFFFAOYSA-N Y 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
Properties
Molecular formula	Ca(MnO4)2
Molar mass	277.9493 g/mol
Appearance	purple crystals deliquesent
Density	2.49 g/cm3
Melting point	140 °C (decomp, tetrahydrate)
Solubility in water	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
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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

It is believed to help whiten teeth.^[2]

See also

• Potassium permanganate
• Sodium permanganate
• Ammonium permanganate

References