1344-43-0

Basic information

• Product Name: MANGANESE (II) OXIDE
• Synonyms: c.i.77726;casselgreen;ci77726;manganesegreen;manganesemonooxide;manganeseoxide(mno);manganeseprotoxide;manganosite
• CAS NO: 1344-43-0
• Molecular Formula: MnO
• Molecular Weight: 70.94
• EINECS: 215-695-8
• Product Categories: Inorganics;metal oxide
• Mol File: 1344-43-0.mol
• Article Data: 2

Chemical Properties

• Melting Point: 1650°C
• Appearance: Green/Powder/Chunks
• Density: 5.45 g/mL at 25 °C(lit.)
• Refractive Index: 2.16
• Water Solubility: Soluble in hydrochloric acid. Insoluble in water.
• CAS DataBase Reference: MANGANESE (II) OXIDE(CAS DataBase Reference)
• NIST Chemistry Reference: MANGANESE (II) OXIDE(1344-43-0)
• EPA Substance Registry System: MANGANESE (II) OXIDE(1344-43-0)

Safety Data

• Hazard Codes: Xn
• Statements: 21-36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• RTECS: OP0900000
• TSCA: Yes
• Hazardous Substances Data: 1344-43-0(Hazardous Substances Data)

Usage

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

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

Different sources of media describe the Uses of 1344-43-0 differently. You can refer to the following data:
1. 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.
2. The main use of manganese dioxide is in dry-cell batteries, such as the alkaline battery and the zinc-carbon battery. It is useful as a pigment, and as a precursor to other manganese compounds. It is used as a reagent in organic synthesis, for instance, for the oxidation of allylic alcohols and arylmethyl alcohols. It is also employed in various industrial purposes such as adhesives and sealant chemicals, lubricants and lubricant additives, fertilizers, oxidizing/reducing agents, plating agents and surface treating agents, processing aids, air care products, paints and coatings.

Flammability and Explosibility

Notclassified

Safety Profile

Moderately toxic by intratracheal and subcutaneous routes. Violent reaction with hydrogen peroxide, Ca(OCl)2, F2, H202. See also MANGANESE COMPOUNDS.

InChI:InChI=1/Mn.O/q+2;-2

Synthetic route

manganese (7439-96-5) + oxygen (80937-33-3) → manganese monoxide (1344-43-0)

Conditions	Yield
In gaseous matrix dc sputtering of metal flakes in O2/He in cylindrical stainless steel hollow cathode;

manganese(IV) oxide (1313-13-9) + lanthanum(III) oxide + calcium oxide → lanthanum monoxide (12031-20-8) + LaO(1+) (60531-61-5) + manganese monoxide (1344-43-0) + LaOMn (220958-03-2) + LaOMn(1+)

Conditions	Yield
In neat (no solvent, solid phase) Irradiation (UV/VIS); laser ablation of La-Ca-Mn-O target (mixture of oxides, nominal composition La0.67Ca0.33MnO3, calcination at 800°C for 5 h); laser beam 532nm (Nd:YAG laser); quadrupole and TOF mass spectrometry;

Upstream product

• 1313-13-9 manganese(IV) oxide 
• 7439-96-5 manganese 
• 80937-33-3 oxygen 

Relevant articles and documents

Microwave spectrum of the MnO radical in the X 6Σ+ state

The microwave spectrum of MnO in the 6Σ+ ground electronic state was detected using a source-modulated submillimeter-wave spectrometer. The MnO radical was efficiently generated by dc sputtering of manganese flakes placed inside a hollow cathode in the presence of an oxygen and helium mixture. In total, 283 spectral lines were measured in the frequency region of 210-450 GHz for nine rotational transitions, each of which showed six fine structure line groups consisting of several hyperfine structure components due to the 55Mn nucleus (I=5/2). A least-squares analysis of the measured line frequencies resulted in the determination of rotational, fine, and hyperfine coupling constants including higher-order spin-orbit distortion terms for the spin-spin, spin-rotation interactions and the Fermi contact interaction of the Mn nucleus. The hyperfine coupling constants were used to assess plausible molecular orbital bonding models.