Dimangantrioxid

Bezeichnung:Dimangantrioxid

CAS-Nr1317-34-6

Englisch Name:MANGANESE (III) OXIDE

CBNumberCB3275540

SummenformelMn2O3

Molgewicht157.87

MOL-Datei1317-34-6.mol

Synonyma

Dimangantrioxid

Dimangantrioxid physikalisch-chemischer Eigenschaften

Schmelzpunkt	1080°C (dec.)
Dichte	4.5 g/mL at 25 °C(lit.)
Löslichkeit	insoluble in H2O
Aggregatzustand	Powder
Wichte	4.5
Farbe	Black
Wasserlöslichkeit	Soluble in acid and ammonium chloride. Insoluble in water, alcohol and acetone.
Merck	14,5737
Expositionsgrenzwerte	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 Datenbank	1317-34-6(CAS DataBase Reference)
EPA chemische Informationen	Manganese(III) oxide (1317-34-6)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-36
WGK Germany	3
RTECS-Nr.	OP0915000
TSCA	Yes
Toxizität	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.

Gefahreninformationscode (GHS)

MANGANESE (III) OXIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
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.
Verwenden
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.
synthetische
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
Sicherheitsprofil
Moderately toxic by subcutaneous and intratracheal routes. See also MANGANESE COMPOUNDS.

MANGANESE (III) OXIDE Upstream-Materialien And Downstream Produkte

Dimangantrioxid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

1317-34-6, MANGANESE (III) OXIDE Verwandte Suche:

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