Manganese(II)oxide
Manganese(II)oxide
CAS: 1344-43-0
Molecular Formula: MnO
Manganese(II)oxide - Names and Identifiers
Manganese(II)oxide - Physico-chemical Properties
| Molecular Formula | MnO |
| Molar Mass | 70.94 |
| Density | 5.45g/mLat 25°C(lit.) |
| Melting Point | 1650°C |
| Water Solubility | Soluble in hydrochloric acid. Insoluble in water. |
| Appearance | Green powder or block |
| Specific Gravity | 5.43～5.46 |
| Color | Green |
| Exposure Limit | ACGIH: TWA 0.02 mg/m3; TWA 0.1 mg/m3OSHA: Ceiling 5 mg/m3NIOSH: IDLH 500 mg/m3; TWA 1 mg/m3; STEL 3 mg/m3 |
| Storage Condition | Room Temprature |
| Refractive Index | 2.16 |
| MDL | MFCD00016226 |
| Physical and Chemical Properties | Characteristics of grass green or gray-green cubic crystal powder or octahedral crystal. melting point 1650 ℃ relative density 5.43~5.46 solubility insoluble in water, soluble in acid and ammonium chloride. |
| Use | Used as feed additives, trace element fertilizer, ferrite raw materials, coating and varnish drying agent |
Manganese(II)oxide - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R21 - Harmful in contact with skin R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| RTECS | OP0900000 |
| TSCA | Yes |
Manganese(II)oxide - Nature
Open Data Verified Data
grass-green or gray-green cubic powder or octahedral crystals. The relative density was 5. 43~5.46. Melting point 1650 °c. 3400 deg C when the sublimation. Insoluble in water, soluble in acid and ammonium chloride. In hot concentrated ammonium chloride solution, manganese chloride and ammonia are formed. Easy to change when heated in air
For other high-valence manganese oxide, such as manganese tetroxide, manganese dioxide, manganese dioxide, etc., is difficult to reduce, 1200 deg C for hydrogen reduction, 1100~1200 deg C can be carbon reduction. Hydrogen and manganese dioxide are generated in red hot water vapor. Co-heating with sulfur to generate sulfur dioxide and sulfur oxides. Melting in an inert gas does not decompose.
Last Update：2024-01-02 23:10:35
Manganese(II)oxide - Preparation Method
Open Data Verified Data
reduction method: pyrolusite and pulverized coal were mixed in a mass ratio of 1:0.2, and reduction roasting was carried out at 800 ° C. For 4H to produce manganese monoxide. The reaction product was cooled under isolated air conditions and then sieved to produce a finished manganese oxide.
Last Update：2022-01-01 11:02:03
Manganese(II)oxide - Introduction
Dissociation sublimation at 3400 ℃. Insoluble in water, soluble in acid and ammonium chloride. In the hot concentrated ammonium chloride solution, manganese chloride and ammonia are formed.
Last Update：2022-10-16 17:13:30
Manganese(II)oxide - Use
Open Data Verified Data
A desiccant used as a raw material for producing ferrite, a coating material and a varnish, a catalyst for producing pentanol, a feed adjuvant, a trace element fertilizer, and the like. It is also used in medicine, smelting, welding, fabric reduction printing and dyeing, Glass coloring, grease bleaching, ceramic kiln industry and dry battery manufacturing.
Last Update：2022-01-01 11:02:03
Manganese(II)oxide - Safety
Open Data Verified Data
each bag was packed with a net weight of 50kg in a hemp or woven bag lined with a polyethylene plastic bag. Multi-layer paper bags may also be used. It was stored in a ventilated and dry warehouse. Should pay attention to moisture, heat. Prevent contact with acids and oxidants, during transport to prevent rain and sun, when loading and unloading to light
To prevent breakage of the package. When there is a fire, it can be suppressed by water, sand, and fire. Toxicity and protection: inhalation of manganese oxide dust, can cause human manganese pneumoconiosis. See manganese metal for others. The maximum allowable concentration is 1mg/m3 of manganese oxide in a condensed aerosol of amorphous silica.
Last Update：2022-01-01 11:02:04
Manganese(II)oxide - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Application | Manganese monoxide, also known as manganese oxide, is an important type of manganese compound, mainly used as raw materials for the production of iron oxides, desiccants for coatings and varnishes, catalysts for pentanol manufacturing, beverage auxiliaries, trace element fertilizers, smelting, welding, fabric reduction printing and dyeing, glass ceramic coloring and fading, grease bleaching and battery manufacturing, etc. |
| preparation | crushing electrolytic metal manganese sheets to a particle size of 15 μm to obtain manganese particles; Place the obtained manganese particles in the sagger, and then push the sagger into the atmosphere furnace; Carbon dioxide gas is introduced into the atmosphere furnace, the air in the atmosphere furnace is driven out, and then the atmosphere furnace is heated up at a rate of 5 ℃/min. When the temperature of the atmosphere furnace reaches 700 ℃ ~ 750 ℃, it enters the constant temperature roasting stage and roasts at constant temperature for 2 hours. After the constant temperature roasting is completed, hydrogen is introduced and the material is naturally cooled in the furnace for a cooling time of 5 hours. When the temperature of the material in the furnace is reduced to below 80 ℃, the sagger is taken out of the furnace, and then the material in the sagger is ground, and high purity manganese monoxide can be obtained after grinding. After testing, the purity of manganese monoxide is 99.92%, the purity of manganese monoxide is high, and the chemical composition and physical properties of manganese monoxide can also meet the requirements of the chemical composition and physical properties of lithium manganate as a lithium ion battery material. |
| toxicity | inhalation of manganese oxide dust can cause manganese pneumoconiosis. See metal manganese for others. Maximum allowable concentration: 1 mg/m3 manganese oxide is contained in the condensed aerosol of amorphous silica. |
| use | used as feed additive, trace element fertilizer, ferrite raw material, paint and varnish desiccant, etc. used as raw material for ferrite production, desiccant for paint and varnish, catalyst for pentanol production, feed auxiliary agent, trace element fertilizer, etc. It is also used in medicine, smelting, welding, fabric reduction printing and dyeing, glass coloring, grease bleaching, ceramic kiln industry and dry battery manufacturing, etc. |
| production method | reduction method mixes pyrolusite and pulverized coal according to the mass ratio of 1:0.2, and carries out reduction roasting at 800 ℃ for 4 hours to generate manganese monoxide. The reaction product is cooled under isolated air conditions, and then sieved to produce a finished manganese oxide. Its MnO2 C → MnO CO MnO2 CO → MnO CO2 |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | subcutaneous-mouse LD50: 1000 mg/kg |
| flammability hazard characteristics | non-combustible, spicy and irritating smoke containing manganese is emitted from the fire site |
| storage and transportation characteristics | warehouse low temperature, ventilation, drying |
| fire extinguishing agent | water, carbon dioxide, dry powder, sand |
| occupational standard | TWA 5 mg (manganese)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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