Manganic oxide
Manganese(III) oxide
CAS: 1317-34-6
Molecular Formula: Mn2O3
Manganic oxide - Names and Identifiers
| Name | Manganese(III) oxide |
| Synonyms | Manganic oxide Manganese trioxide Manganese(3+) oxide Manganese manganate Dimanganese trioxide Manganese(III) oxide Manganese sisquioxide Manganese sesquioxide Manganese oxide (Mn2O3) dimanganic oxygen(-2) anion oxo(oxomanganiooxy)manganese oxo-(oxomanganiooxy)manganese keto(ketomanganiooxy)manganese |
| CAS | 1317-34-6 |
| EINECS | 215-264-4 |
| InChI | InChI=1/2Mn.3O/q2*+3;3*-2 |
| InChIKey | GEYXPJBPASPPLI-UHFFFAOYSA-N |
Manganic oxide - Physico-chemical Properties
| Molecular Formula | Mn2O3 |
| Molar Mass | 157.87 |
| Density | 4.5g/mLat 25°C(lit.) |
| Melting Point | 1080°C (dec.) |
| Water Solubility | Soluble in acid and ammonium chloride. Insoluble in water, alcohol and acetone. |
| Appearance | Powder |
| Specific Gravity | 4.5 |
| Color | Black |
| Exposure Limit | ACGIH: TWA 0.02 mg/m3; TWA 0.1 mg/m3OSHA: Ceiling 5 mg/m3NIOSH: IDLH 500 mg/m3; TWA 1 mg/m3; STEL 3 mg/m3 |
| Merck | 14,5737 |
| Storage Condition | Room Temprature |
| MDL | MFCD00016217 |
| Use | Is the raw materials and intermediate products of manganese compounds |
Manganic oxide - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| RTECS | OP0915000 |
| TSCA | Yes |
Manganic oxide - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Physical and chemical properties | Manganese trioxide is a black cubic crystal, insoluble in water, acetic acid and ammonium chloride solutions, and soluble in other inorganic acids. heating to 1080 ℃ to decompose to generate Mn3O4 and O2. Dissolve in cold hydrochloric acid into a brown solution, in hot dilute sulfuric acid or concentrated sulfuric acid into a red solution, in hot nitric acid decomposition into MnO2 and manganese nitrate, heat decomposition into Mn3O4 and release O2. It exists in the form of α-Mn2O3 and γ-Mn2O3. |
| preparation method | α-type can be produced by heating the nitrate, carbonate or chloride, and hydride of divalent manganese in the air to 600~800 ℃ Decomposition. The γ-type can be prepared by heating MnO2 at 500 ℃ in vacuum for 78 hours, or by dehydrating γ-MnO(OH). |
| Application | The hydrated oxide of manganese trioxide for trivalent manganese is called manganese brown, which is used as an printing agent for cloth, and it is also a raw material for making manganese compounds And intermediate products. |
| store | manganese trioxide is packed in inert gas plastic bags, sealed and stored in a dry and cool environment, and should not be exposed to the air to prevent oxidation and agglomeration due to moisture, thus affecting the dispersion performance and use effect. |
| use | is the raw material and intermediate product of manganese compounds |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | subcutaneous-mouse LD50: 616 mg/kg |
| flammability hazard characteristics | non-combustible; toxic manganese smoke from the fire site |
| storage and transportation characteristics | warehouse low temperature, ventilation, drying |
| fire extinguishing agent | water, carbon dioxide, dry powder, sand |
| occupational standard | TWA 5 mg (manganese)/m3 |
Last Update：2024-04-10 22:29:15
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