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Manganese Dioxide / 99% Pure/ Reagent Grade/Fine Powder
Product Name: Manganese Dioxide
CAS No.: 1313-13-9
Purity :98% ,99%
Model NO: JD-MDEG-99
Grade :Electronic grade
Molecular formula::MnO2
Chemical Parameters:
| Items | Specifications | Result |
| MnO2(%) | ≥96.5% | 97% |
| Ca(%) | ≤0.1 | 0.013 |
| Mg(%) | ≤0.05 | 0.012 |
| SO4(%) | ≤0.3 | 0.08 |
| Pb(%) | ≤0.002 | 0.0001 |
| Fe(%) | ≤0.01 | 0.003 |
| 粒度分布 D50 (μm) | 15-30 | 22.5 |
| K% | ≤0.01 | 0.004 |
| As% | ≤0.001 | 0.0002 |
Chemical Parameters:
| Items | Specifications | Result |
| MnO2 (%) | ≥99 | 99.15 |
| Ca(%) | ≤0.02 | 0.007 |
| Mg(%) | ≤0.02 | 0.005 |
| SO4(%) | ≤0.08 | 0.051 |
| Pb(%) | ≤0.002 | 0.0005 |
| Fe(%) | ≤0.01 | 0.005 |
| 粒度分布 D50 (μm) | 1-5 | 2.7 |
| K% | ≤0.01 | 0.0021 |
| Na% | ≤0.01 | 0.004 |
| Preparation | Pure manganese(IV) oxide (precipitate form) may be prepared by reducing permanganate ion with a manganous salt: 2KMnO4 + 3MnSO4 + 2H2O → 5MnO2 + K2SO4 + 2H2SO4 Manganese(IV) oxide can also be precipitated by oxidation of a manganese(II) salt using an oxidizing agent such as hypochlorite or peroxydisulphate: Mn2+ + S2O82– + 2H2O → MnO2 + 2SO42– + 4H+ Manganese(IV) oxide may also be made by thermal decomposition of manganese(II) nitrate; or from roasting manganese(II) carbonate in air: Mn(NO3)2 → MnO2 + 2NO2 MnCO3 + ½ O2 → MnO2 + CO2 A highly active gamma-MnO2 can be produced by treating manganese(III) oxide with hot sulfuric acid: Mn2O3 + H2SO4 → MnO2 + MnSO4 + H2O Mn2O3 is derived from pyrolusite by heating the mineral at 600–800°C or reducing with powdered coal at 300°C. |
What are the main uses of Manganese Dioxide?
Manganese dioxide (MnO2) is soluble in water and HNO3 and soluble in HCl. It occurs in nature as the blue-black mineral pyrolusite. In glass, manganese dioxide is used as a colorant and decolorizer.
The major use of manganese oxides is an ore of manganese for the manufacturing of steel; manganese serves to increase the hardness and decrease the brittleness of steel. Another important use of manganese oxides is as the cathode material of common zinc/carbon and alkaline batteries (such as flashlight batteries).
