Barium permanganate
| Names | |
|---|---|
| IUPAC name
Barium permanganate
| |
| Other names
Barium manganate(VII)
| |
| Properties | |
| Ba(MnO4)2 | |
| Molar mass | 375.198 g/mol |
| Appearance | Dark violet-brown crystals |
| Odor | Odorless |
| Density | 3.77 g/cm3 (20 °C) |
| Melting point | 200 °C (392 °F; 473 K) Decomposes |
| Boiling point | Decomposes |
| 62.5 g/100 ml (20 °C) | |
| Hazards | |
| Flash point | Non-flammable |
| Related compounds | |
| Related compounds
|
Barium manganate |
| 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. It is often used to prepare more exotic permangante salts, by double displacement reaction with their sulfate salt.
Contents
Properties
Chemical
Addition of sulfuric acid to barium permangante will produce permanganic acid and even manganese heptoxide if the acid is concentrated enough.
Physical
Barium permangante is a dark purple or purple-brown solid, soluble in water.
Availability
Barium permanganate is sold by various lab suppliers.
Preparation
Barium permanganate may be produced by disproportionation of barium manganate in a mildly acidic solution.
Preparations relying on aqueous reactions of barium manganate are extremely slow process due to the low solubility of the manganate.
Projects
- Make permanganic acid
- Make ammonium permanganate
Handling
Safety
Barium permanganate is corrosive and a strong oxidizer. Avoid contact with combustible materials and acids.
Storage
Barium permanganate should be kept in PE or glass containers, with a good lid.
Disposal
Addition of hydrogen peroxide will cause it to break down to manganese dioxide and barium oxide/hydroxide. Addition of sulfuric acid will precipitate barium sulfate, which is non-toxic, and can be dumped in trash.
