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 |
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 |
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.
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.
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.
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.