Sodium permanganate

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Sodium permanganate
IUPAC name	Sodium manganate(VII)
Other names	Sodium permanganate
Identifiers
CAS number	[10101-50-5]
Properties
Molecular formula	NaMnO4
Molar mass	159.94 g/mol (as monohydrate)
Appearance	Red solid
Density	2.47 g/cm3
Solubility in water	Soluble
Hazards
Main hazards	Oxidizer
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Sodium permanganate is the inorganic chemical compound NaMnO₄. In this salt, manganese is in the +7 oxidation state. The salt is also known as "permanganate of sodium". The permanganate ion is a strong oxidizing agent. It dissolves in water to give deep purple solutions, evaporation of which gives prismatic purple-black glistening crystals. It has a sweet taste and is odourless.

Sodium permanganate has essentially the same properties and use as potassium permanganate and can be used as its direct substitute. Though it is more soluble, its hygroscopic nature reduces its stability and hence its efficacy as a primary standard. Thus potassium permanganate is used more extensively in the laboratory than its sodium counterpart.