Is manganese dioxide harmful to the human body?

 Overview of Manganese Dioxide MnO2

Manganese dioxide is an inorganic compound with a chemical formula of MnO2. It is a black amorphous powder or black orthorhombic crystal. It is hardly soluble in water, weak acid, weak alkali, nitric acid, cold sulfuric acid, and soluble in concentrated hydrochloric acid under heating to produce chlorine gas. . Used in the preparation of manganese salt, and also used as an oxidant, rust remover, and catalyst.

Manganese dioxide is a strong oxidant in acid medium.

Manganese dioxide has an octahedral structure. The oxygen atoms are on the corners of the octahedrons. The manganese atoms are in the octahedrons. The octahedrons are connected together to form a single or double chain. These chains and other chains co-top to form a tunnel structure with voids. The octahedron is either hexagonal close-packed or square close-packed.

Is manganese dioxide harmful to the human body?

Excessive manganese entering the body can cause poisoning. It mainly damages the central nervous system, especially acute poisoning in extrapyramidal system industrial production. If a large amount of smoke and dust of this product is inhaled for a short time, "metal fume fever" may occur, and the patient will have headache, nausea, chills, high fever, and sweating. Chronic poisoning manifests as neurasthenia syndrome, autonomic dysfunction, psychiatric symptoms such as imbalance of excitement and inhibition, and toxic psychosis in severe cases; extrapyramidal damage manifestations such as increased muscle tone, tremor, speech disorder, abnormal gait, etc. .

Application of Manganese Dioxide MnO2

Manganese dioxide is used as a depolarizer for dry batteries, as a catalyst and oxidant in the synthesis industry, as a colorant, decolorizer, and iron removal agent in the glass industry and enamel industry. Used in the manufacture of metal manganese, special alloys, manganese iron castings, gas masks and electronic material ferrites, etc. In addition, it can also be used in the rubber industry to increase the viscosity of rubber, and it can also be used as a catalyst for chemical experiments.

Organic synthesis use

Manganese dioxide is very useful in organic chemistry. The form of manganese dioxide used for the oxide varies. Since manganese dioxide has many crystal types, its chemical formula can be written as MnO2·x(H2O)n, where x is between 0 and 0.5, and n can be greater than zero. Potassium permanganate (KMnO₄) and manganese sulfate (MnSO₄) react at different pH values to produce manganese dioxide.

One of the special chemical reactions of manganese dioxide is the conversion of alcohols to aldehydes. Even if the alcohol has a double bond, it will not be oxidized by manganese dioxide: cis-RCH=CHCH2OH + MnO2 → cis-RCH=CHCHO + H2O + MnO

No matter how active it is, its products will not be oxidized. Glycols can be oxidized by manganese dioxide to dialdehydes. Other manganese dioxide has many reactions and can be used to oxidize amines, aromatics, and triols.

Laboratory use

Used as a catalyst for the decomposition of hydrogen peroxide to produce oxygen; as a catalyst for heating potassium chlorate to decompose to produce oxygen; the thermite reacts with elemental aluminum powder to produce manganese. Used as pigments, yellow glass, etc.; reacts with hot concentrated hydrochloric acid to generate chlorine; reacts with molten caustic potassium (potassium hydroxide) in the air to generate potassium manganate; in the decomposition reaction of potassium permanganate, manganese dioxide is used as High autocatalyst of potassium manganate.

Manganese dioxide MnO2 price

The price of manganese dioxide MnO2 will vary with random factors such as the production cost of manganese dioxide MnO2, transportation costs, the international situation, and the market supply and demand of manganese dioxide. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for manganese dioxide MnO2, please feel free to send an inquiry to get the latest price of manganese dioxide MnO2.

Suppliers of Manganese Dioxide MnO2

As a global manganese dioxide MnO2 supplier, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including chromium carbide, aluminum carbide, manganese dioxide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.

Manganese Dioxide Properties

Other Namesmanganese oxide, MnO2 powder
CAS No.1313-13-9
Compound FormulaMnO2
Molecular Weight86.94
AppearanceBlack Powder
Melting Point535 °C
Boiling PointN/A
Density5.03 g/cm3
Solubility in H2OInsoluble
Exact Mass86.9279

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