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Barium permanganate

Barium permanganate
Identifiers
7787-36-2 YesY
3D model (Jmol) Interactive image
ECHA InfoCard 100.029.191
EC Number 232-110-1
PubChem 24587
Properties
Ba(MnO4)2
Molar mass 375.198 g/mol
Appearance dark violet to brown crystals
Odor odorless
Density 3.77 g/cm3
Melting point 200 °C (392 °F; 473 K) (decomposes)
62.5 g/100 mL (29 °C)
Solubility decomposes in alcohol
Structure
rhombic
Hazards
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazard OX: Oxidizer. E.g., potassium perchlorateNFPA 704 four-colored diamond
Related compounds
Other cations
Magnesium permanganate
Strontium permanganate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Barium permanganate is a chemical compound, with the formula Ba(MnO4)2.

Barium permanganate may be produced by disproportionation of barium manganate in a mildly acidic solution, or by oxidation of barium manganate with strong oxidants. Preparations relying on aqueous reactions of barium manganate are extremely slow process due to the low solubility of the manganate.

Permanganic acid can be prepared by the reaction of dilute sulfuric acid with a solution barium permanganate, the insoluble barium sulfate byproduct being removed by filtering:

The sulfuric acid used must be dilute; reactions of permanganates with concentrated sulfuric acid yield the anhydride, manganese heptoxide.



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