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Manganese(II) hydroxide

Manganese(II) hydroxide
Mg(OH)2Xray.jpg
Names
Other names
Manganese dihydroxide, manganese hydroxide, Manganous hydroxide
Identifiers
ECHA InfoCard 100.126.826
Properties
H2MnO2
Molar mass 88.95 g·mol−1
Appearance white solid
Density 3.258 g/cm3
Melting point decomposes
0.00034 g/100 mL at 18 °C.
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Manganese(II) hydroxide is the inorganic compound with the formula Mn(OH)2. It is a white solid although samples darken quickly upon exposure to air owing to oxidation. It is poorly soluble in water.

Manganese(II) hydroxide precipitates as a solid when an alkali metal hydroxide is added to an aqueous solution of Mn2+ salt:

Manganese(II) hydroxide oxidizes readily in air, as indicated by darkening of samples.

The compound adopts the brucite structure, as do several other metal dihydroxides.


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