Manganese oxide (Mn3O4)
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Manganese oxide (Mn3O4)
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CAS No:
1317-35-7
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Formula:
Mn3O4
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Chemical Name:
Manganese oxide (Mn3O4)
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Synonyms:
Manganese oxide (Mn3O4);Manganomanganic oxide;Trimanganese tetroxide;Trimanganese tetraoxide;Manganese oxide;M 34 (pigment);M 34;Manganese oxide (MnO4/3);Manganese tetraoxide;Brownox;339311-30-7;2149632-09-5;2398670-84-1
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CAS No:
Characteristics
4
-0.47520
brown Powder
4.8 g/cm3
1564 °C
Solubility in water: none
0 mmHg (approx)
Trachea-rat LDL0: 375 mg/kg
Non-combustible; produces toxic fumes of manganese compounds in the fire
Safety Information
NONH for all modes of transport
2
36/37/38
26-36
OP0895000
Xi
Treasury is low temperature, ventilated, dry; avoid dust
Reacts violently with strong reducing agents, acids, alkalis
Stable.
Manganese oxide (Mn3O4) Use and Manufacturing
The roasting method burns metal manganese or manganese oxides, hydroxides, sulfates, carbonates, sulfites, nitrates and permanganates in air or oxygen at 1000°C, then cools and crushes Prepare trimanganese tetroxide. For example, using high-purity β-MnO2 as raw material, roasting in a boiling furnace at 980-1000°C, cooling and pulverizing to obtain γ-Mn3O4 product. The 3MnO2→Mn3O4+O2 reduction method uses manganese dioxide or manganese ore as raw materials. It is first roasted into manganese trioxide, and then further reduced at 250 to 500°C in the presence of methane gas to form trimanganese tetroxide, which is cooled and crushed The finished product of trimanganese tetroxide is obtained. 2MnOOH→Mn2O3+H2O3Mn2O3+0.25CH4→2Mn3O4+0.25CO2+0.5H2O
Used for making ceramic and glass pigments.
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