Manganese Dioxide
High Quality
Earliest Shipment
Competitive price
Professional Service
Product: Manganese Dioxide
High Quality
Earliest Shipment
Competitive price
Professional Service
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.
| IUPAC name[hide]Manganese oxide Manganese(IV) oxide | |
| Other names[hide]Pyrolusite | |
| CAS number | 1313-13-9 Y |
| PubChem | 14801 |
| ChemSpider | 14117 Y |
| EC number | 215-202-6 |
| Jmol-3D images | Image 1 |
| [show]O=[Mn]=O | |
| [show]InChI=1S/Mn.2O Y Key: NUJOXMJBOLGQSY-UHFFFAOYSA-N Y | |
| Molecular formula | MnO2 |
| Molar mass | 86.9368 g/mol |
| Appearance | Brown-black solid |
| Density | 5.026 g/cm3 |
| Melting point | 535 °C decomp |
| Solubility in water | insoluble |
| Std enthalpy of formation ΔfHo298 | −520.9 kJ/mol |
| Standard molar entropy So298 | 53.1 J K−1 mol−1 |
| MSDS | ICSC 0175 |
| EU Index | 025-001-00-3 |
| EU classification | Harmful (Xn) Oxidizer (O) |
| R-phrases | R20/22 |
| S-phrases | (S2), S25 |
| NFPA 704 | 112OX |
| Flash point | 535 °C |
| Other anions | Manganese disulfide |
| Other cations | Technetium dioxide Rhenium dioxide |
| Related manganese oxides | Manganese(II) oxide Manganese(II,III) oxide Manganese(III) oxide Manganese heptoxide |
