| Identification | More | [Name]
MANGANESE (II) OXIDE | [CAS]
1344-43-0 | [Synonyms]
MANGANESE(+2)OXIDE
MANGANESE (II) OXIDE
MANGANESE MONOXIDE
MANGANESE OXIDE
c.i.77726
casselgreen
ci77726
manganesegreen
manganesemonooxide
manganeseoxide(mno)
manganeseprotoxide
manganosite
manganous
manganousoxide
mon-manganese(ii)oxid
naturalmanganosite
nu-manese
rosensthiel
Manganese Monooxide (MNO)
MANGANESE(II) OXIDE, 99.99+% | [EINECS(EC#)]
215-695-8 | [Molecular Formula]
MnO | [MDL Number]
MFCD00016226 | [Molecular Weight]
70.94 | [MOL File]
1344-43-0.mol |
| Chemical Properties | Back Directory | [Melting point ]
1650°C | [density ]
5.45 g/mL at 25 °C(lit.)
| [refractive index ]
2.16 | [solubility ]
insoluble in H2O; soluble in acid solutions | [form ]
Powder/Chunks | [color ]
Green | [Specific Gravity]
5.43～5.46 | [Water Solubility ]
Soluble in hydrochloric acid. Insoluble in water. | [Crystal Structure]
NaCl type | [crystal system]
Cube | [Space group]
Fm3m | [Lattice constant]
| a/nm | b/nm | c/nm | α/o | β/o | γ/o | V/nm3 | | 0.4436 | 0.4436 | 0.4436 | 90 | 90 | 90 | 0.0873 |
| [Exposure limits]
ACGIH: TWA 0.02 mg/m3; TWA 0.1 mg/m3
OSHA: Ceiling 5 mg/m3
NIOSH: IDLH 500 mg/m3; TWA 1 mg/m3; STEL 3 mg/m3 | [CAS DataBase Reference]
1344-43-0(CAS DataBase Reference) | [EPA Substance Registry System]
Manganese oxide (MnO) (1344-43-0) |
| Hazard Information | Back Directory | [Chemical Properties]
grass green powder(s); cub; enthalpy of fusion 54.40kJ/mol; produced from MnO2 ores by roasting in a reducing atmospheric, e.g., methane; used in textile printing, in ceramics, in paints [HAW93] [CRC10] | [Uses]
Manganous monoxide (MnO) is used for textile printing, ceramics, paints, colored (green)
glass, bleaching, and fertilizers. It is also used as dietary supplement and reagent in analytical
chemistry. | [Flammability and Explosibility]
Notclassified |
| Safety Data | Back Directory | [Hazard Codes ]
Xn | [Risk Statements ]
R21:Harmful in contact with skin.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
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 | [Safety Profile]
Moderately toxic by
intratracheal and subcutaneous routes.
Violent reaction with hydrogen peroxide,
Ca(OCl)2, F2, H202. See also
MANGANESE COMPOUNDS. | [Hazardous Substances Data]
1344-43-0(Hazardous Substances Data) |
| Questions And Answer | Back Directory | [Physical Properties]
Green cubic crystal; refractive index 2.16; density 5.37 g/cm3 at 23°C; Moh’s hardness 5.5; melts at 1945°C; insoluble in water.
| [Occurrence and Uses]
Manganese(II) oxide is used in the fertilizer industry as a source of manganese in fertilizers; in feedstuff formulations; and as an intermediate in the production of several manganese compounds.
| [Production]
Manganese(II) oxide is obtained commercially from manganese(IV) oxide (manganese dioxide) by the reduction with hydrogen, carbon monoxide or methane at elevated temperatures (>800°C):
MnO2 + CO → MnO + CO2
MnO2 + H2 → MnO + H2O
The oxide also can be made by thermal decomposition of manganese(II) carbonate or manganese(II) oxalate in the absence of air:
MnCO3 → MnO + CO2
Also, careful dehydration of manganese(II) hydroxide, Mn(OH)2, under controlled conditions in the absence of air yields MnO.
| [Reactions]
Manganese(II) oxide is the lowest oxide of manganese and it is purely a basic oxide. It reacts with acids to form their manganese(II) salts:
MnO + H2SO4 → MnSO4 + H2O
MnO + 2HCl → MnCl2 + H2O
The compound also is oxidized by air or oxygen to higher oxides of manganese. When heated cautiously in air, the product is manganese sesquioxide or manganese(III) oxide:
4MnO + O2 → 2Mn2O3
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