Manganese Dioxide
Manganese dioxide, Manganese(IV) oxide
| Synonyms | Pyrolusite, hyperoxide of manganese, black oxide of manganese, manganic oxide |
| Cas No. | 13113-13-9 |
| Chemical Formula | MnO2 |
| Molar Mass | 86.9368 g/mol |
| Appearance | Brown-black solid |
| Density | 5.026 g/cm3 |
| Melting Point | 535 °C (995 °F; 808 K) (decomposes) |
| Solubility in Water | Insoluble |
| Magnetic Susceptibility (χ) | +2280.0·10−6 cm3/mol |
General Specification for Manganese Dioxide
| MnO2 | Fe | SiO2 | S | P | Moisture | Partice Size(Mesh) | Suggested Application |
| ≥30% | ≤20% | ≤25% | ≤0.1% | ≤0.1% | ≤7% | 100-400 | Brick, Tile |
| ≥40% | ≤15% | ≤20% | ≤0.1% | ≤0.1% | ≤7% | 100-400 | |
| ≥50% | ≤10% | ≤18% | ≤0.1% | ≤0.1% | ≤7% | 100-400 | Non-ferrous metal smelting, desulfurization and denitrification, manganese sulfate |
| ≥55% | ≤12% | ≤15% | ≤0.1% | ≤0.1% | ≤7% | 100-400 | |
| ≥60% | ≤8% | ≤13% | ≤0.1% | ≤0.1% | ≤5% | 100-400 | |
| ≥65% | ≤8% | ≤12% | ≤0.1% | ≤0.1% | ≤5% | 100-400 | Glass, Ceramics,Cement |
| ≥70% | ≤5% | ≤10% | ≤0.1% | ≤0.1% | ≤4% | 100-400 | |
| ≥75% | ≤5% | ≤10% | ≤0.1% | ≤0.1% | ≤4% | 100-400 | |
| ≥80% | ≤3% | ≤8% | ≤0.1% | ≤0.1% | ≤3% | 100-400 | |
| ≥85% | ≤2% | ≤8% | ≤0.1% | ≤0.1% | ≤3% | 100-40 |
Enterprise Specification for Electrolytic Manganese Dioxide
| Items | Unit | Pharmaceutical Oxidation&Catalytic Grade | P Type Zinc Manganese Grade | Mercury-Free Alkaline Zinc-Manganese Dioxide Battery Grade | Lithium Manganese Acid Grade | |
| HEMD | TEMD | |||||
| Manganese Dioxide (MnO2) | % | 90.93 | 91.22 | 91.2 | ≥92 | ≥93 |
| Moisture (H2O) | % | 3.2 | 2.17 | 1.7 | ≤0.5 | ≤0.5 |
| Iron (Fe) | ppm | 48. 2 | 65 | 48.5 | ≤100 | ≤100 |
| Copper (Cu) | ppm | 0.5 | 0.5 | 0.5 | ≤10 | ≤10 |
| Lead (Pb) | ppm | 0.5 | 0.5 | 0.5 | ≤10 | ≤10 |
| Nickel (Ni) | ppm | 1.4 | 2.0 | 1.41 | ≤10 | ≤10 |
| Cobalt (Co) | ppm | 1.2 | 2.0 | 1.2 | ≤10 | ≤10 |
| Molybdenum (Mo) | ppm | 0.2 | - | 0.2 | - | - |
| Mercury (Hg) | ppm | 5 | 4.7 | 5 | - | - |
| Sodium (Na) | ppm | - | - | - | - | ≤300 |
| Potassium (K) | ppm | - | - | - | - | ≤300 |
| Insoluble Hydrochloric Acid | % | 0.5 | 0.01 | 0.01 | - | - |
| Sulfate | % | 1.22 | 1.2 | 1.22 | ≤1.4 | ≤1.4 |
| PH Value (determined by distilled water method) | - | 6.55 | 6.5 | 6.65 | 4~7 | 4~7 |
| Specific Area | m2/g | 28 | - | 28 | - | - |
| Tap Density | g/l | - | - | - | ≥2.0 | ≥2.0 |
| Particle Size | % | 99.5(-400mesh) | 99.9(-100mesh) | 99.9(-100mesh) | 90≥ (-325mesh) | 90≥ (-325mesh) |
| Particel Size | % | 94.6(-600mesh) | 92.0(-200mesh) | 92.0(-200mesh) | As Requirement | |
Enterprise Specification for Featured Manganese Dioxide
| Product Category | MnO2 | Product Characteristics | ||||
| Activated Manganese Dioxide C Type | ≥75% | It has high advantages such as γ-type crystal structure, large specific surface area, good liquid absorption performance, and discharge activity; | ||||
| Activated Manganese Dioxide P Type | ≥82% | |||||
| Ultrafine Electrolytic Manganese Dioxide | ≥91.0% | The product has small particle size (strictly control the initial value of the product within 5μm), narrow particle size distribution range, γ-type crystal form, high chemical purity, strong stability, and good dispersion in powder (the The diffusion force is significantly higher than that of traditional products by more than 20%), and it is used in colorants with high color saturation and other superior properties; | ||||
| High Purity Manganese Dioxide | 96%-99% | After years of hard work, UrbanMines has successfully developed high-purity manganese dioxide, which has the characteristics of strong oxidation and strong discharge. In addition, the price has an absolute advantage over electrolytic manganese dioxide; | ||||
| γ Electrolytic Manganese Dioxide | As Requirement | Vulcanizing agent for polysulfide rubber, multi-functional CMR, suitable for halogen, weather-resistant rubber, high activity, heat resistance, and strong stability; | ||||
What is Manganese Dioxide used for?
*Manganese Dioxide occurs naturally as the mineral pyrolusite, which is the source of manganese and all its compounds; Used to make manganese steel as an oxidizer.
*MnO2 is primarily used as a part of dry cell batteries: alkaline batteries and the so-called Leclanché cell, or zinc–carbon batteries. Manganese Dioxide has been successfully used as inexpensive and abundant battery material. Initially, naturally occurring MnO2 was used followed by chemically synthesized manganese dioxide substantially improving the performance of Leclanché batteries. Later, the more efficient electrochemically prepared manganese dioxide (EMD) was applied enhancing cell capacity and rate capability.
*Many industrial uses include the use of MnO2 in ceramics and glass-making as an inorganic pigment. Used in glassmaking to remove the green tint caused by iron impurities. For making amethyst glass, decolorizing glass, and painting on porcelain, faience, and majolica;
*The precipitate of MnO2 is used in electrotechnics, pigments, browning gun barrels, as drier for paints and varnishes, and for printing and dyeing textiles;
*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.
*MnO2 is also used in water treatment applications.
