high purity Co(OH)2 powder CAS 12672-51-4 Cobalt hydroxide powder Co(OH)2

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What is cobalt hydroxide Co(OH)2?
Cobalt hydroxide, an inorganic compound with the chemical formula Co(OH)2, is a light cyan or rose-colored powder. Insoluble in water, slightly amphoteric, insoluble in strong alkali, but soluble in acid and ammonium salt solution. It is mainly used as a coloring agent for glass and enamel, a raw material for making other cobalt compounds, and a drying agent for varnish and paint.

Physical properties of cobalt hydroxide
Cobalt hydroxide Co(OH)2 has two crystalline phases:
α-Co(OH)2 has a structure similar to that of water talc and is typically characterized by the structure of layered double hydroxyl complex metal oxides. Because of its large layered structure, it has good electrical conductivity, and the color of this type of cobalt hydroxide is usually blue-cyan. However, this phase is not stable and is in a sub-stable state, and is easily transformed into the β-phase.
β-Co(OH)2 has a hydromagnesite structure with hexagonal tightly packed hydroxyl ions and cations filling all the octahedral gaps between each two adjacent hydroxyl ions; it forms a structural layer of coordination octahedra. The structural layers are ionic bonds within the structural layers, and the structural layers are maintained in phase. Its color tends to be brick red, or rose red.

Characteristics of cobalt hydroxide Co(OH)2
Density: 3.597g/cm3
Melting point: 1100℃
Vapor pressure: 24.5mmHg at 25℃
Properties: light cyan or rose-colored powder. Its color is related to the size of the particle, and the microfine powder is light cyan, and it is rose-colored when it becomes hexagonal crystal system. It is oxidized to brown in the air.
Solubility: insoluble in water, soluble in acid and ammonium salt solution

Application of cobalt hydroxide Co(OH)2
Cobalt hydroxide is used in chemical production to make cobalt salt, cobalt-containing catalyst and electrolytic production of hydrogen peroxide decomposer. In the paint industry, it is used as a drying agent for paints. It is also used as a colorant in the glass industry.
Cobalt hydroxide can also be used to make cobalt salt, cobalt catalyst, dip solution for battery electrode and paint desiccant; it is used to color glass and enamel, make cobalt compound, and desiccant for paint and varnish.

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Packaging of cobalt hydroxide Co(OH)2 powder : Vacuum packing, 1kg/bag, or as your request.

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