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| CAS No.: | 1313-13-9 |
|---|---|
| Name: | Manganese dioxide |
| Molecular Structure: | |
|
|
|
| Formula: | MnO2 |
| Molecular Weight: | 86.9368 |
| Synonyms: | EP Type II;CMD 100;Cellmax CMD-U;G 80-325;FMH;Electrolytic manganese dioxide;Manganese (IV) oxide;Manganese dioxide electrolytic;Manganese (IV) oxide, activated, oxidizing agent;Manganese Dioixde,Electrolytic;ManCanses(Ⅳ)oxide; |
| EINECS: | 215-202-6 |
| Density: | 5.02 g/cm3 |
| Melting Point: | 535 °C (dec.)(lit.) |
| Flash Point: | 535oC |
| Solubility: | insoluble in water |
| Appearance: | black powder |
| Hazard Symbols: |
 Xn
|
| Risk Codes: | 20/22 |
| Safety: | 25 |
| PSA: | 34.14000 |
| LogP: | -0.23760 |
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- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| at 430℃; for 4h; | 95.5% |
| In neat (no solvent) Kinetics; byproducts: nitrous gases; investigation of thermal decompn. at 163-196 °C;; | |
| With chlorine In water Irradiation (UV/VIS); |
- 172332-99-9
manganese(II) nitrate
- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| at 430℃; for 4h; | 95.5% |
| Conditions | Yield |
|---|---|
| In neat (no solvent, solid phase) byproducts: Cl2, O2; thermal decompn., 190-240°C; | A 95% B 5% |
- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| With fluorine In nitric acid oxidn. of weakly H2SO4-acidic ice-cooled Mn(II)-salt-soln. with F2;; | 91.5% |
| With hypochloric acid In not given | |
| With bromine In ammonia oxidn. of ammoniacal Mn(II)-salt-soln. at 50 °C with Br2;; |
A
- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| With O2 In pyridine 1 atm O2, refluxing for 10 h (pptn.); collection (filtration); second crop and MnO2 on evapn. of filtrate; elem. anal.; | A 7% B 90% |
- 64593-36-8
Mn(N,N'-bis(salicylaldehyde)-1,1,2,2-tetramethylethylenediimine)
A
- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| With O2 In pyridine 1 atm O2, refluxing for 10 h (pptn.); collection (filtration); second crop and MnO2 on evapn. of filtrate; elem. anal.; | A 10% B 90% |
A
- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| With O2 In pyridine 1 atm O2, refluxing for 10 h (pptn.); collection (filtration); second crop and MnO2 on evapn. of filtrate; elem. anal.; | A 9% B 90% |
A
- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| With O2 In pyridine 1 atm O2, refluxing for 10 h (pptn.); collection (filtration); second crop and MnO2 on evapn. of filtrate; elem. anal.; | A 9% B 89% |
- 58770-12-0
Mn(N,N'-bis(salicylaldehyde)-1,3-propanediimine) * H2O
A
- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| With O2 In pyridine 1 atm O2, refluxing for 10 h (pptn.); collection (filtration); second crop and MnO2 on evapn. of filtrate; elem. anal.; | A 9% B 88% |
A
- 1313-13-9
manganese(IV) oxide
| Conditions | Yield |
|---|---|
| With O2 In pyridine 1 atm O2, refluxing for 10 h (pptn.); collection (filtration); second crop and MnO2 on evapn. of filtrate; elem. anal.; | A 10% B 87% |
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Chemistry
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IUPAC Name: Dioxomanganese
Empirical Formula: MnO2
Molecular Weight: 86.9368
Canonical SMILES: O=[Mn]=O
InChI: InChI=1S/Mn.2O
InChIKey: NUJOXMJBOLGQSY-UHFFFAOYSA-N
EINECS: 215-202-6
Product Categories: Inorganics
Water Solubility: insoluble
Stability: Stable. Incompatible with strong acids, strong reducing agents, organic materials.
Density: 5.026 g/cm3
Flash point: 535 °C
Appearance: black powder
Melting Point: 535 °C (dec.)(lit.)
Classification Code of Manganese dioxide (CAS NO.1313-13-9): Reproductive Effect
History
The chemical properties of Manganese dioxide have been well examined since relatively pure materials have long been readily found or prepared. The manganese dioxide was subsequently recovered by the Weldon process.In molten KOH in the presence of oxygen, MnO2 reacts to give the manganate anion, as discussed below under Applications.
Uses
One of Manganese dioxide (CAS NO.1313-13-9) first uses was in glass making. In modern times, the predominant application of Manganese dioxide is as a component of dry cell batteries. A specialized use of manganese dioxide is as an oxidant in organic synthesis. The principal use for MnO2 is for dry-cell batteries, such as the alkaline battery and the zinc-carbon battery. MnO2 is also used for production of MnO4–. It is used extensively as an oxidizing agent in organic synthesis, for example, for the oxidation of allylic alcohols.
Production
The natural occuring Manganese dioxide contains impurities and a considerable amount of manganese(III) ions. The production of synthetic manganese dioxide is important. Two groups of methods are used, yielding chemical manganese dioxide (CMD) and electrolytical manganese dioxide (EMD). The CMD is mostly used for the production of ferrites, while the EMD is used for the production of batteries.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | subcutaneous | 422mg/kg (422mg/kg) | Zhurnal Vsesoyuznogo Khimicheskogo Obshchestva im. D.I. Mendeleeva. Journal of the D.I. Mendeleeva All-Union Chemical Society. Vol. 19, Pg. 186, 1974. | |
| rabbit | LDLo | intravenous | 45mg/kg (45mg/kg) | "Merck Index; an Encyclopedia of Chemicals, Drugs, and Biologicals", 11th ed., Rahway, NJ 07065, Merck & Co., Inc. 1989Vol. 11, Pg. 899, 1989. | |
| rat | LD50 | oral | > 3478mg/kg (3478mg/kg) | EHP, Environmental Health Perspectives. Vol. 10, Pg. 95, 1975. | |
| rat | LDLo | intratracheal | 50mg/kg (50mg/kg) | LUNGS, THORAX, OR RESPIRATION: EMPHYSEMA LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 20(1), Pg. 25, 1955. |
Consensus Reports
Manganese dioxide and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory.
Safety Profile
Poison by intravenous and intratracheal routes. Moderately toxic by subcutaneous route. Experimental reproductive effects. A powerful oxidizer. Flammable by chemical reaction. It must not be heated or rubbed in contact with easily oxidizable matter. Violent thermite reaction when heated with aluminum. Potentially explosive reaction with hydrogen peroxide, peroxomonosulfuric acid, chlorates + heat, anilinium perchlorate. Ignition on contact with hydrogen sulfide. Violent reaction with oxidizers, potassium azide (when warmed), diboron tetrafluoride, Incandescent reaction with calcium hydride, chlorine trifluoride, rubidium acetylide (at 350°C). Vigorous reaction with hydroxylaminium chloride. Incompatible with H2O2, H2SO5, Na2O2. Keep away from heat and flammable materials.
Hazard Codes: 
Xn
Risk Statements: 20/22
R20/22:Harmful by inhalation and if swallowed.
Safety Statements: 25
S25:Avoid contact with eyes.
RIDADR: 3137
WGK Germany: 1
RTECS: OP0350000
PackingGroup: III
Standards and Recommendations
OSHA PEL: CL 5 mg(Mn)/m3
ACGIH TLV: TWA 0.03 mg(Mn)/m3
Specification
Manganese dioxide (CAS NO.1313-13-9), its Synonyms are Manganese peroxide ; Manganese superoxide ; Manganese(IV) oxide ; Manganese dioxide, ore of Chapter 26 ; Manganese oxide (MnO2) ; BOG manganese ; Black manganese oxide ; Braunstein ; Manganese (diossido di) ; Manganese (dioxyde de) .