Manganese dioxide

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Manganese dioxide
Names
IUPAC names
Manganese oxide
Manganese(IV) oxide
Other names
Pyrolusite, hyperoxide of manganese, black oxide of manganese, manganic oxide
Identifiers
  • 1313-13-9 checkY
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.013.821
EC Number
  • 215-202-6
RTECS number
  • OP0350000
  • O=[Mn]=O
Properties
MnO
2
Molar mass 86.9368 g/mol
Appearance Brown-black solid
Density 5.026 g/cm3
Melting point 535 °C (995 °F; 808 K) (decomposes)
insoluble
+2280.0·10−6 cm3/mol
Thermochemistry
Std enthalpy of
formation
ΔfHo298
−520 kJ·mol−1[1]
Standard molar
entropy
So298
53 J·mol−1·K−1[1]
Hazards
EU classification Harmful (Xn)
Oxidizer (O)
NFPA 704

1
1
2
 
R-phrases R20/22
S-phrases (S2), S25
Related compounds
Other anions Manganese disulfide
Other cations Technetium dioxide
Rhenium dioxide
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 dioxide, also known as manganese(IV) oxide, is a chemical compound of manganese and oxygen. It contains manganese in the +4 oxidation state. Its chemical formula is MnO2. It is black and powdery. It is used as a depolarizer in alkaline batteries and Leclanche batteries. It is found naturally as the mineral pyrolusite.

Related pages[change | change source]

References[change | change source]

  1. 1.0 1.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 978-0-618-94690-7.