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Manganese Dioxide
Manganese Dioxide

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Manganese Dioxide
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Product: Manganese Dioxide
High Quality
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Manganese(IV) oxide is the inorganic compound with the formula MnO2. This blackish or brown solid occurs naturally as the mineral pyrolusite, which is the main ore of manganese and a component of manganese nodules. The principal use for MnO2 is for dry-cell batteries, such as the alkaline battery and the zinc-carbon battery.[1] MnO2 is also used as a pigment and as a precursor to other manganese compounds, such as KMnO4. It is used as a reagent in organic synthesis, for example, for the oxidation of allylic alcohols.


Manganese dioxideIdentifiersPropertiesThermochemistryHazardsRelated compounds
IUPAC name[hide]Manganese oxide
Manganese(IV) oxide
Other names[hide]Pyrolusite
CAS number1313-13-9 Y
ChemSpider14117 Y
EC number215-202-6
Jmol-3D imagesImage 1
[show]InChI=1S/Mn.2O Y
Molecular formulaMnO2
Molar mass86.9368 g/mol
AppearanceBrown-black solid
Density5.026 g/cm3
Melting point

535 °C decomp

Solubility in waterinsoluble
Std enthalpy of
formation ΔfHo298
−520.9 kJ/mol
Standard molar
entropy So298
53.1 J K−1 mol−1
EU Index025-001-00-3
EU classificationHarmful (Xn)
Oxidizer (O)
S-phrases(S2), S25
NFPA 704112OX
Flash point535 °C
Other anionsManganese disulfide
Other cationsTechnetium dioxide
Rhenium dioxide
Related manganese oxidesManganese(II) oxide
Manganese(II,III) oxide
Manganese(III) oxide
Manganese heptoxide

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