四氧化三锰
CAS: 1317-35-7
Molecular Formula: Mn3O4-2
四氧化三锰 - Names and Identifiers
| Synonyms | MANGANESE OXIDE Manganese(Ii,Iii) MANGANESE TETROXIDE Manganese Tetroxide Manganese Tetraoxide Trimanganese tetraox Manganese(+2,+3)Oxide hydroxy(oxo)manganese hydroxy(keto)manganese Trimanganese Tetroxide Manganese(II,IV) oxide Trimanganese Tetraoxide trimanganese tetraoxide Tetramanganese Trioxide Manganeseoxidebrownpowder Manganese (Ii,Iiii) Oxide Trimanganese (Ii, Iii) Tetraoxide Manganomanganic Oxide (Saline Oxide) |
| CAS | 1317-35-7 |
| EINECS | 215-266-5 |
| InChI | InChI=1/3Mn.2H2O.2O/h;;;2*1H2;;/q;2*+1;;;;/p-2/r2HMnO2.Mn/c2*2-1-3;/h2*2H |
四氧化三锰 - Physico-chemical Properties
| Molecular Formula | Mn3O4-2 |
| Molar Mass | 228.81 |
| Density | 4.8g/mLat 25°C(lit.) |
| Melting Point | 1705°C |
| Boling Point | 1564℃ |
| Water Solubility | insoluble H2O [KIR81]; soluble HCl, releasing Cl2 [MER06] |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Black powder |
| Specific Gravity | 4.856 |
| Color | brown |
| Merck | 13,5759 |
| Storage Condition | RT, dark |
| Stability | Stable. |
| MDL | MFCD00016218 |
| Physical and Chemical Properties | WGK Germany:2 RTECS:OP0895000 |
| Use | Used to make ceramic and glass pigments. |
四氧化三锰 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - 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 | 2 |
| RTECS | OP0895000 |
四氧化三锰 - Nature
Open Data Verified Data
brown powder, belonging to tetragonal system. The relative density is 4. 876 and the melting point is 1564 ℃. Insoluble in water, soluble in hydrochloric acid to release oxygen. Mnz and Mn3 in the crystal are distributed in two different lattice positions, which are magnetic, and are ferromagnetic below 42K.
Last Update：2025-06-10 22:55:16
四氧化三锰 - Preparation Method
Open Data Verified Data
The electrolytic manganese dioxide is ground into a semi-finished product with a Raman Mill, washed with 4~6mol/L nitric acid at 40~60 ℃ to a pH value of about 6, dried at 105 ℃, manganese tetraoxide was prepared by calcining at 955~1170 ℃ for 50~130min and vacuum rapid cooling outside the furnace. Or reduction roasting with pyrolusite after leaching with sulfuric acid, after purification with ammonium bicarbonate metathesis reaction to generate manganese carbonate, and then filtration, separation, drying, roasting and obtained. 300 mesh metal manganese can also be used as raw material, ammonium salt is added, and the reaction is carried out at 60 ° C. To obtain the finished product of manganese tetraoxide.
Last Update：2025-06-10 22:55:16
四氧化三锰 - Introduction
Insoluble in water, partially soluble in sulfuric acid and hydrochloric acid.
Last Update：2022-10-16 17:13:20
四氧化三锰 - Application
Open Data Verified Data
used in the production of manganese, zinc, iron Soft Magnetic Ferrite, magnetic cores, magnetic disks and magnetic tapes for storing information in electronic computers, Transformers and high-quality inductors for telephones, television flyback transformers, magnetic heads for magnetic recording, magnetic amplifiers, saturable inductors, antenna rods, etc.
Last Update：2025-08-19 16:24:40
四氧化三锰 - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | manganese tetroxide is a black tetragonal crystal, also known as manganese glow, manganese black ore and active manganese oxide. it is crystallized by burning and belongs to spinel and is an important industrial raw material. Manganese tetroxide is mainly used in the electronics industry and is the raw material for the production of soft magnetic ferrite. Soft magnetic ferrite is made of manganese, zinc, and iron oxides mixed according to a certain ratio and then sintered. It has a narrow remanence induction curve and can be magnetized repeatedly. At the same time, its DC resistivity is very high, which can avoid eddy current loss. |
| usage | manganese tetroxide can be mainly used as magnetic core, magnetic disk and magnetic tape for storing information in electronic computers, telephone transformers and high-quality inductors, TV flyback transformers, magnetic heads for magnetic recording, inductors, magnetic amplifiers, saturation inductors, antenna rods, etc. In addition, it can also be used as a pigment for certain paints or coatings. Paints or coatings containing manganese tetroxide sprayed on steel have better corrosion resistance than paints or coatings containing titanium dioxide or iron oxide. Mainly used in the electronics industry, it is the raw material for the production of soft magnetic ferrite. Soft magnetic ferrite is made of manganese, zinc, and iron oxides mixed according to a certain ratio and then sintered. It has a narrow remanence induction curve and can be magnetized repeatedly. At the same time, its DC resistivity is very high, which can avoid eddy current loss. It can be used as magnetic cores, magnetic disks and magnetic tapes for storing information in electronic computers, telephone transformers and high-quality inductors, TV flyback transformers, magnetic heads for magnetic recording, inductors, magnetic amplifiers, saturated inductors, antenna rods, etc. In addition, it can also be used as a pigment for certain paints or coatings. Paints or coatings containing manganese tetroxide sprayed on steel have better corrosion resistance than paints or coatings containing titanium dioxide or iron oxide. Used in the manufacture of optical glass and low-temperature thermistor Used in the manufacture of ceramics and glass pigments. |
| toxicity | see metal manganese. |
| Production method | The roasting method burns manganese or manganese oxides, hydroxides, sulfates, carbonates, sulfites, nitrates and permanganates in air or oxygen at 1000 ℃, and cools and pulverizes to obtain manganese tetroxide. For example, γ-Mn3O4 products are prepared by roasting high purity β-MnO2 at 980~1000 ℃ in a boiling furnace, cooling and crushing. Its 3MnO2→Mn3O4 O2 reduction method uses manganese dioxide or water manganese ore as raw materials, first roasting into manganese trioxide, and then in the presence of methane gas, it is further reduced to generate manganese tetroxide at 250~500 ℃. The finished product of manganese tetroxide is prepared by cooling and crushing. Its 2MnOOH → Mn2O3 H2O3Mn2O3 0.25CH4 → 2Mn3O4 0.25CO2 0.5H2O |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | trachea-rat LDL0:375 mg/kg |
| explosive hazard characteristics | intense reaction with strong reducing agent, acid, alkali |
| flammability hazard characteristics | non-combustible; toxic manganese smoke from the fire site |
| storage and transportation characteristics | warehouse is low temperature, ventilated and dry; Avoid dust |
| fire extinguishing agent | water, carbon dioxide, dry powder, sand |
| occupational standard | TWA 5 mg (manganese)/m3 |
Last Update：2024-04-10 22:29:15
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