1317-34-6

Basic information

• Product Name: MANGANESE (III) OXIDE
• Synonyms: manganicoxide;Manganese(III) oxide, 99.999% metals basis;MANGANESE(III) OXIDE, -325 MESH, 99%;MANGANESE (III) OXIDE, MN>70+% 300 MESH (POWDER 99%);MANGANESE (III) OXIDE, 99.9%;Manganese(III)oxide,99%;keto(ketomanganiooxy)manganese;oxo(oxomanganiooxy)manganese
• CAS NO: 1317-34-6
• Molecular Formula: Mn2O3
• Molecular Weight: 157.87
• EINECS: 215-264-4
• Product Categories: Inorganics;metal oxide
• Mol File: 1317-34-6.mol
• Article Data: 0

Chemical Properties

• Melting Point: 1080°C (dec.)
• Appearance: Black/Powder
• Density: 4.5 g/mL at 25 °C(lit.)
• Water Solubility: Soluble in acid and ammonium chloride. Insoluble in water, alcohol and acetone.
• Merck: 14,5737
• CAS DataBase Reference: MANGANESE (III) OXIDE(CAS DataBase Reference)
• NIST Chemistry Reference: MANGANESE (III) OXIDE(1317-34-6)
• EPA Substance Registry System: MANGANESE (III) OXIDE(1317-34-6)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• RTECS: OP0915000
• TSCA: Yes
• Hazardous Substances Data: 1317-34-6(Hazardous Substances Data)

Usage

Description

Manganese (III) oxide, also known as manganite, is a black, lustrous powder that can sometimes appear tinged brown. It is a very hard substance that decomposes at 1080℃ and is soluble in cold hydrochloric acid. However, it is not soluble in nitric acid (as it decomposes), hot sulfuric acid, and is insoluble in water. Manganese (III) oxide is noncombustible and can be obtained by igniting manganese(IV) oxide or a manganese(II) salt in air at 800°C. It reacts slowly with cold dilute acids to form manganese(III) salts and occurs naturally as braunite (3Mn2O3.MnSiO3) and the monohydrate (Mn2O3.H2O) in the mineral manganite. The crystal lattice of manganese (III) oxide contains Mn3+ and O2– ions, and it undergoes disproportionation with concentrated alkalis to give manganese(II) and manganese(IV) ions.

Uses

1. Used in Ceramic Magnets and Semiconductors:
Manganese (III) oxide is used as a raw material for the production of ceramic magnets and semiconductors due to its unique chemical and physical properties.
2. Used as a Precursor to Lithium Manganese Oxide:
Manganese (III) oxide serves as a precursor in the synthesis of lithium manganese oxide, which is an important material in the development of advanced battery technologies.
3. Used as a Battery Cathode:
Manganese (III) oxide is utilized as a cathode material in batteries, specifically in lithium-ion batteries, due to its ability to improve the overall performance and efficiency of the battery.
4. Used in the Mineral Industry:
Manganese (III) oxide occurs naturally in minerals such as braunite and manganite, making it an important resource in the mineral industry for various applications.

Preparation

Anhydrous manganese(III) oxide is found as the mineral braunite, Mn2O3, while a hydrated form, Mn2O3.H2O, which is chemically more reactive, occurs as manganite. Manganese forms both anions and cations in oxidation state +3. Simple salts of tervalent manganese are not stable. However, complexes are more stable, the hexacyanomanganates(III) being an example: K3Mn(CN)6 is a red crystalline solid, isomorphous with potassium hexacyanoferrate(III) and slowly hydrolysed. Manganese(III) oxide is formed as a grey solid by heating manganese(IV) oxide to 700°C for several hours: 4MnO2 ---> 2Mn203 + O2 It is converted into trimanganese tetroxide when heated above 940°C in air or reduced by hydrogen above 230°C. Hot concentrated hydrochloric acid is oxidized to chlorine by manganese(III) oxide: Mn203 (s) + 6H + + 2e- ==2Mn2+ + 3H2O Mn203 (s) + 6H + + 2Cl- ---> 2Mn2+ + 3H2O + Cl2

Hazard

Flammable in finely divided form. Toxic by inhalation of dust.

Flammability and Explosibility

Notclassified

Safety Profile

Moderately toxic by subcutaneous and intratracheal routes. See also MANGANESE COMPOUNDS.

InChI:InChI=1/2Mn.3O/q2*+3;3*-2