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 |
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. |
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 |
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.
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.
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.