Names | |
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Other names
Manganese dihydroxide, manganese hydroxide, Manganous hydroxide
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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).
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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.