Description Chemical Properties Uses Toxicity evaluation Resources
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Manganese dioxide

Description Chemical Properties Uses Toxicity evaluation Resources
Manganese dioxide Structure
Manganese dioxide
  • CAS No.1313-13-9
  • Chemical Name:Manganese dioxide
  • CBNumber:CB4139599
  • Molecular Formula:MnO2
  • Formula Weight:86.94
  • MOL File:1313-13-9.mol
Manganese dioxide Property
  • Melting point: :535 °C (dec.) (lit.)
  • Density  :5.02
  • storage temp.  :Store below +30°C.
  • solubility  :<0.001g/l insoluble
  • form  :powder
  • color  :gray
  • Specific Gravity :5.026
  • Water Solubility  :insoluble
  • Merck  :14,5730
  • Stability: :Stable. Incompatible with strong acids, strong reducing agents, organic materials.
  • CAS DataBase Reference :1313-13-9(CAS DataBase Reference)
  • EWG's Food Scores :2
  • FDA UNII :TF219GU161
  • NIST Chemistry Reference :manganese(IV) dioxide(1313-13-9)
  • EPA Substance Registry System :Manganese dioxide (1313-13-9)
  • Hazard Codes  :Xn
  • Risk Statements  :20/22
  • Safety Statements  :25
  • RIDADR  :3137
  • WGK Germany  :1
  • RTECS  :OP0350000
  • TSCA  :Yes
  • HS Code  :2820 10 00
  • PackingGroup  :III
  • Toxicity :LD50 orally in rats: >40 mmole/kg (Holbrook)
  • NFPA 704:
    2 0
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal wordWarning
  • Hazard statements H302-H332-H302+H332
  • Precautionary statements P261-P264-P270-P301+P312a-P304+P340-P501a
Manganese dioxide Price More Price(53)
  • Brand: Sigma-Aldrich
  • Product number: 918040
  • Product name : ManganeseOxide(MnO2)nanosheets
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  • Packaging: 10ML
  • Price: $260
  • Updated: 2021/12/16
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  • Brand: Sigma-Aldrich
  • Product number: 1.05957
  • Product name : Manganese(IV) oxide
  • Purity: powder EMPLURA?
  • Packaging: 1 kg
  • Price: $193.32
  • Updated: 2021/12/16
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  • Brand: Sigma-Aldrich
  • Product number: 217646
  • Product name : Manganese(IV) oxide
  • Purity: activated, ~85%, <10 μm
  • Packaging: 12kg
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  • Updated: 2021/12/16
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  • Brand: Sigma-Aldrich
  • Product number: 8.05958
  • Product name : Manganese(IV) oxide
  • Purity: (precipitated active) for synthesis
  • Packaging: 100 g
  • Price: $36.81
  • Updated: 2021/12/16
  • Buy: Buy
  • Brand: Sigma-Aldrich
  • Product number: 217646
  • Product name : Manganese(IV) oxide
  • Purity: activated, ~85%, <10 μm
  • Packaging: 5g
  • Price: $43.5
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Manganese dioxide Chemical Properties,Usage,Production

  • Description Manganese dioxide, mainly used as a depolarizer in dry cell batteries, is the most important non-metallic form of manganese. In either traditional alkaline and rechargeable battery cells, Manganese dioxide takes in electrons through a redox reaction, becoming Manganese III oxide. It also has applications in lithium-ion technologies.
    It is also the primary precursor to ferromanganese, an alloy of iron used for its lower melting point and low cost.
    It is black in appearance and used to color glass and ceramics, as well as for cave art and possibly body paint in prehistorical eras. Further uses include the purification of drinking water, and production of pure oxygen and chlorine.
  • Chemical Properties Manganese dioxide ( MnO2 ) , known as pyrolusite when found in nature , is the most plentiful of all the manganese compounds. MnO2 is Iron-black to dark steel-gray or bluish mineral; black or bluish-black streak; metallic or dull luster. Soluble in hydrochloric acid.
    Manganese dioxide
    Manganese dioxide is an important component in batteries. It is also used in glassmaking to remove the green fint caused by iron impurities.
  • Uses The chemistry of manganese(III) is not extensive, and in the higher oxidation states manganese dioxide and potassium permanganate are the most important compounds.
    Manganese dioxide is also used in the manufacture of glass to bleach the colour of any iron present. If excess manganese dioxide is added, a pink coloration can be produced in the glass and if a large excess is present it will appear black.
    Other uses of manganese dioxide include its use as an oxidizing agent in organic chemistry and as an oxidizing agent in safety matches, fireworks and flares. It is also an effective adsorbent for hydrogen sulphide and is also used to colour ceramics.
  • Toxicity evaluation Inhalation exposure to high concentrations of manganese dusts (specifically manganese dioxide [MnO2] and manganese tetroxide [Mn3O4]) can cause an inflammatory response in the lung, which, over time, can result in impaired lung function. Lung toxicity is manifested as an increased susceptibility to infections such as bronchitis and can result in manganic pneumonia. Pneumonia has also been observed following acute inhalation exposures to particulates containing other metals. Thus, this effect might be characteristic of inhalable particulate matter and might not depend solely on the manganese content of the particle.
  • Resources
  • Chemical Properties Manganese dioxide is a black crystalline solid or powder.
  • Physical properties Black tetragonal crystals; density 5.08 g/cm3; Moh’s hardness 6.3; decomposes at 535°C; insoluble in water.
  • Uses Manganese(IV) oxide is the most important ore of manganese from which the metal is mostly manufactured. The oxide occurs in nature as the mineral pyrolusite as heavy gray lumps, or black when powdered.
    The mineral is used to produce manganese metal, most manganese salts, and also manganese steel and other alloys. The metallurgical applications of manganese(IV) oxide mainly involve making ferromanganese and special manganese alloys. Another important application of manganese(IV) oxide is in manufacturing dry-cell batteries and alkaline cells. The oxide also is a colorant in brick, tile, porcelain and glass; a drier for paints and varnishes; a 552 MANGANESE(IV) OXIDEpreparation for printing and dyeing textiles; a curing agent for polysulfide rubbers; an adsorbent for hydrogen sulfide and sulfur dioxide; an oxidizing agent in many organic syntheses such as quinone and hydroquinone; and a catalyst in laboratory preparation of oxygen from potassium chlorate. Manganese(IV) oxide also is used to make welding rods and fluxes, and ceramic magnets (ferrites); and is an additive to fertilizers.
  • Uses The mineral is the source of manganese and all its Compounds; largely used in manufacture of manganese steel; oxidizer; in alkaline batteries (dry cells); for making amethyst glass, decolorizing glass; painting on porcelain, faience and majolica. The ppt is used in electrotechnics, pigments, browning gun barrels, drier for paints and varnishes, printing and dyeing textiles.
  • Uses As an oxidizing agent, source of metallic manganese, decolorizing glass, painting porcelain, as an analytical reagentManganese(IV) oxide is used as an oxidizing agent in organic synthesis such as oxidation of allylic/benzylic alcohols, as a textile dye, as a reducing agent, and as a component of dry cell batteries such as zinc-carbon battery and alkaline battery. It is also used in making pigments for glasses and ceramics, and drier for paints. Further it is used in the manufacture of manganese steel and several manganese derivatives including potassium permanganate, a powerful versatile oxidant. Catalytic hydration of nitriles to amides by flowing through manganese dioxide has been reported. Manganese dioxide supported on inorganic oxide can be used for oxidation of methylamine through CWAO (Catalytic Wet Air Oxidation). It has high potential as highly efficient and robust material for water oxidation reaction (WORs).
  • Preparation Pure manganese(IV) oxide (precipitate form) may be prepared by reducing permanganate ion with a manganous salt:
    2KMnO4 + 3MnSO4 + 2H2O → 5MnO2 + K2SO4 + 2H2SO4
    Manganese(IV) oxide can also be precipitated by oxidation of a manganese(II) salt using an oxidizing agent such as hypochlorite or peroxydisulphate:
    Mn2+ + S2O82– + 2H2O → MnO2 + 2SO42– + 4H+
    Manganese(IV) oxide may also be made by thermal decomposition of manganese(II) nitrate; or from roasting manganese(II) carbonate in air: Mn(NO3)2 → MnO2 + 2NO2
    MnCO3 + ½ O2 → MnO2 + CO2
    A highly active gamma-MnO2 can be produced by treating manganese(III) oxide with hot sulfuric acid:
    Mn2O3 + H2SO4 → MnO2 + MnSO4 + H2O
    Mn2O3 is derived from pyrolusite by heating the mineral at 600–800°C or reducing with powdered coal at 300°C.
  • General Description
    Manganese(IV) oxide (MnO2) is an eco-friendly chemical having a high theoretical specific capacitance.
  • Reactivity Profile The stability of manganese dioxide is due primarily to its insolubility. It is, however, readily attacked by reducing agents in acid solution, for example oxidizing concentrated hydrochloric acid to chlorine. In hot concentrated alkali it dissolves to give a purple solution which contains an equimolar mixture of trivalent manganese, probably as (Mn(OH)6)3- and manganate(V), (MnO4)3-. Manganese dioxide is also one of the most active catalysts for the oxidation of carbon monoxide near room temperature.
  • Hazard Oxidizing agent, may ignite organic materials.
  • Industrial uses Manganese dioxide (MnO2) is soluble in water and HNO3 and soluble in HCl. It occurs in nature as the blue-black mineral pyrolusite. In glass, manganese dioxide is used as a colorant and decolorizer.
    The major use of manganese oxides is an ore of manganese for the manufacturing of steel; manganese serves to increase the hardness and decrease the brittleness of steel. Another important use of manganese oxides is as the cathode material of common zinc/carbon and alkaline batteries (such as flashlight batteries).
  • 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 oxilzable 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℃). Vigorous reaction with hydroxylaminium chloride. Incompatible with H202, H2SO j, Naz02. Keep away from heat and flammable materials. See also MANGANESE COMPOUNDS.
  • Potential Exposure Manganese dioxide is used as depolarizer for dry cell batteries, for production of manganese metal; as an oxidizing agent; laboratory reagent; and in making pyrotechnics and matches; in dry cell batteries.
  • Shipping UN1479 Oxidizing solid, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, Technical Name Required. UN3137 (powder) Oxidizing solid, flammable, Hazard Class: 5.1; Labels: 5.1-Oxidizer, 4.1 Flammable solid, Technical Name Required.
  • Incompatibilities A powerful oxidizer. Incompatible with strong acids; reducing agents; combustible materials (such as fuel and clothing; organic materials. Mixtures with calcium hydride is a heat- and friction-sensitive explosive. Vigorous reaction with hydrogen sulfide, diboron tetrafluoride; calcium hydride; chlorine trifluoride; hydrogen peroxide; hydroxyaluminum chloride; anilinium perchlorate. Decomposes when heated above 553C producing manganese(III)oxide and oxygen, which increases fire hazard. Reacts violently with aluminum (thermite reaction), potassium azide; rubidium acetylide; in the presence of hea
  • Waste Disposal Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number N450, must conform to USEPA regulations for storage, transportation, treatment, and disposal of waste. Dispose of waste material as hazardous waste using a licensed disposal contractor to an approved landfill. Dispose of contents and container to an approved waste disposal plant. Containers must be disposed of properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office. All federal, state, and local environmental regulations must be observed. Do not discharge into drains or sewers
Manganese dioxide Preparation Products And Raw materials
Raw materials
Preparation Products
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