ChemicalBook > CAS DataBase List > MANGANESE (III) OXIDE

MANGANESE (III) OXIDE

CAS No.1317-34-6
Chemical Name:MANGANESE (III) OXIDE
CBNumber:CB3275540
Molecular Formula:Mn2O3
Formula Weight:157.87
MOL File:1317-34-6.mol

MANGANESE (III) OXIDE Property

Melting point 1080°C (dec.)
bulk density 0.35g/cm3
Density 4.5 g/mL at 25 °C(lit.)
solubility insoluble in H2O
form Powder
color Black
Specific Gravity 4.5
Water Solubility Soluble in acid and ammonium chloride. Insoluble in water, alcohol and acetone.
Merck 14,5737
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
InChIKey GEYXPJBPASPPLI-UHFFFAOYSA-N
CAS DataBase Reference 1317-34-6(CAS DataBase Reference)
FDA UNII XQ8YIG4A7C
EPA Substance Registry System Manganese(III) oxide (1317-34-6)
UNSPSC Code 12352303
NACRES NA.23

Safety

Hazard Codes :Xi
Risk Statements :36/37/38
Safety Statements :26-36
WGK Germany :3
RTECS :OP0915000
TSCA :Yes
Toxicity :mouse,LD50,subcutaneous,616mg/kg (616mg/kg),Zhurnal Vsesoyuznogo Khimicheskogo Obshchestva im. D.I. Mendeleeva. Journal of the D.I. Mendeleeva All-Union Chemical Society. Vol. 19, Pg. 186, 1974.

NFPA 704:

	0
2		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordWarning
Hazard statements H315-H319-H335
Precautionary statements P261-P264-P271-P280-P302+P352-P305+P351+P338

MANGANESE (III) OXIDE Price More Price(11)

Brand: Sigma-Aldrich(India)
Product number: 463701
Product name : Manganese(III) oxide
Purity: 99.9% trace metals basis
Packaging: 5G
Price: ₹13076.6
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 463701
Product name : Manganese(III) oxide
Purity: 99.9% trace metals basis
Packaging: 25G
Price: ₹26748.58
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 377457
Product name : Manganese(III) oxide
Purity: ?325?mesh, 99%
Packaging: 250G
Price: ₹15490.58
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 377457
Product name : Manganese(III) oxide
Purity: ?325?mesh, 99%
Packaging: 1KG
Price: ₹28902.75
Updated: 2022/06/14
Buy: Buy

Brand: ALFA India
Product number: ALF-087791-A3
Product name : Manganese(III) oxide, 98%
Purity:
Packaging: 2kg
Price: ₹58912
Updated: 2022/05/26
Buy: Buy

MANGANESE (III) OXIDE Chemical Properties,Usage,Production

Chemical Properties manganese(III) oxide is a black, lustrous powder, sometimes tinged brown. Very hard.decomposes at 1080℃. Soluble in cold hydrochloric acid; not soluble in nitric acid (decomposes), hot sulfuric acid; insoluble in water. Noncombustible.

manganese(III) oxide is 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. Manganese(III) oxide occurs in nature as braunite (3Mn2O3.MnSiO3 ) and the monohydrate (Mn2O 3.H2O) occurs in the mineral manganite. The manganese(III) oxide crystal lattice contains Mn3+ and O2– ions. With concentrated alkalis, it undergoes disproportionation to give manganese(II) and manganese(IV) ions.
Uses Manganese(III) oxide is used to produce ceramic magnets and semiconductors. Further, it serves as a precursor to lithium manganese oxide. In addition to this, it acts as a useful battery cathode.
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
Definition In nature as manganite, a manganese ore.
Hazard Flammable in finely divided form. Toxic by inhalation of dust.
Flammability and Explosibility Not classified
Safety Profile Moderately toxic by subcutaneous and intratracheal routes. See also MANGANESE COMPOUNDS.