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| CAS No.: | 1317-34-6 |
|---|---|
| Name: | Manganese (III) oxide |
| Molecular Structure: | |
|
|
| Formula: | Mn2O3 |
| Molecular Weight: | 157.88 |
| Synonyms: | Manganese oxide (Mn2O3); |
| EINECS: | 215-264-4 |
| Density: | 4.5 g/mL at 25 °C(lit.) |
| Melting Point: | 1080 °C (dec.) |
| Solubility: | Soluble in acid and ammonium chloride. Insoluble in water, alcohol and acetone. |
| Appearance: | COA |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | 36/37/38 |
| Safety: | 26-36 |
| PSA: | 43.37000 |
| LogP: | -0.30600 |
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Consensus Reports
Manganese and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory.
Standards and Recommendations
OSHA PEL: CL 5 mg(Mn)/m3
ACGIH TLV: TWA 0.03 mg(Mn)/m3
Specification
The Manganese(III) oxide, with the CAS registry number 1317-34-6, is also known as Manganese manganate. It belongs to the product category of Inorganics. Its EINECS registry number is 215-264-4. This chemical's molecular formula is Mn2O3 and molecular weight is 157.87. Its IUPAC name is called oxo(oxomanganiooxy)manganese.
Physical properties of Manganese(III) oxide: (1)H-Bond Donor: 0; (2)H-Bond Acceptor: 3; (3)Rotatable Bond Count: 0; (4)Exact Mass: 157.860843; (5)MonoIsotopic Mass: 157.860843; (6)Topological Polar Surface Area: 43.4; (7)Heavy Atom Count: 5; (8)Formal Charge: 0; (9)Complexity: 34.2; (10)Isotope Atom Count: 0; (11)Defined Atom StereoCenter Count: 0; (12)Undefined Atom StereoCenter Count: 0; (13)Defined Bond StereoCenter Count: 0; (14)Undefined Bond StereoCenter Count: 0; (15)Covalently-Bonded Unit Count: 1.
Preparation of Manganese(III) oxide: Heating MnO2 in air at below 800°C α-Mn2O3 is produced (higher temperatures produce Mn3O4). γ-Mn2O3 can be produced by oxidation followed by dehydration of manganese(II) hydroxide. Many preparations of nano-crystalline Mn2O3 have been reported, for example syntheses involving oxidation of MnII salts or reduction of MnO2. Manganese (III) oxide is formed by the redox reaction in an alkaline cell:
2MnO2 + Zn → Mn2O3 + ZnO
Manganese (III) oxide Mn2O3 must not be confused with MnOOH manganese (III) oxohydroxide. Contrary to Mn2O3, MnOOH is a compound that decomposes at about 300°C to form MnO2.
When you are using this chemical, please be cautious about it as the following:
This chemical may cause inflammation to the skin or other mucous membranes. It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. Whenever you will contact it, please wear suitable protective clothing.
You can still convert the following datas into molecular structure:
(1)Canonical SMILES: O=[Mn]O[Mn]=O
(2)InChI: InChI=1S/2Mn.3O
(3)InChIKey: GEYXPJBPASPPLI-UHFFFAOYSA-N
The toxicity data is as follows:
Organism Test Type Route Reported Dose (Normalized Dose) Effect Source 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. rat LDLo intratracheal 100mg/kg (100mg/kg) LUNGS, THORAX, OR RESPIRATION: EMPHYSEMA
LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMAGigiena i Sanitariya. For English translation, see HYSAAV. Vol. 20(1), Pg. 25, 1955.