Manganese dioxide - Simple English Wikipedia, the free encyclopedia
Names | ||
---|---|---|
IUPAC names Manganese oxide Manganese(IV) oxide | ||
Other names Pyrolusite, hyperoxide of manganese, black oxide of manganese, manganic oxide | ||
Identifiers | ||
| ||
3D model (JSmol) | ||
ChEBI | ||
ChemSpider | ||
ECHA InfoCard | 100.013.821 | |
EC Number |
| |
PubChem CID | ||
RTECS number |
| |
CompTox Dashboard (EPA) | ||
| ||
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 ΔfH | −520 kJ·mol−1[1] | |
Standard molar entropy S | 53 J·mol−1·K−1[1] | |
Hazards | ||
EU classification | Harmful (Xn) Oxidizer (O) | |
NFPA 704 | | |
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). | ||
![]() ![]() ![]() | ||
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]- ↑ 1.0 1.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 978-0-618-94690-7.