Magnese Dioxide MnO2 Powder Properties And Applications
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Update time : 2021-10-18 15:16:13
Manganese dioxide is an inorganic compound with a chemical formula of MnO2, which is black amorphous powder or black orthorhombic crystals. Manganese dioxide is used in the preparation of manganese salts, and also as an oxidant and rust remover.
Magnese Dioxide MnO2 Powder Properties
Manganese dioxide is difficult to dissolve in water, weak acid, weak base, nitric acid, cold sulfuric acid, and it dissolves in concentrated hydrochloric acid under heating to produce chlorine gas.
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.
Manganese dioxide is an amphoteric oxide. It is a very stable black powdery solid at room temperature and can be used as a depolarizer for dry batteries. In the laboratory, its oxidizing properties are often used to produce chlorine by the action of concentrated HCl.
Magnese Dioxide MnO2 Powder Applications
Manganese dioxide is used as a depolarizer for dry batteries, as a catalyst and oxidant in the synthesis industry, as a colorant, decolorizer, and deironing agent in the glass industry and enamel industry. Manganese dioxide is used to manufacture metallic manganese, special alloys, ferromanganese castings, gas masks, and electronic material ferrites.
In addition, manganese dioxide can also be used in the rubber industry to increase the viscosity of rubber, and it can also be used as a catalyst in chemical experiments.
Laboratory use
Manganese dioxide is used as a catalyst for the decomposition of hydrogen peroxide to produce oxygen.
MnO2 powder is used as a catalyst when heating potassium chlorate to decompose to produce oxygen.
Manganese dioxide and elemental aluminum powder undergo thermite reaction to produce manganese.
MnO2 powder is used as a pigment, yellow glass, etc.
Manganese dioxide reacts with hot concentrated hydrochloric acid to produce chlorine.
Manganese dioxide reacts with molten caustic potassium (potassium hydroxide) in the air to produce potassium manganate.
In the decomposition reaction of potassium permanganate, manganese dioxide acts as a self-catalyst for potassium permanganate.
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