Appearance and properties: black gray hexagonal system powder. The relative density of 5.18. Dissolved in acid, insoluble in water, alcohols, ammonia. Susceptible to carbon monoxide reduced to metallic cobalt. Easy with silica, alumina or zinc oxide to reflect high temperatures to generate a variety of pigments. 
 Quality Standard: 
 Cobalt (Co) ≥ 72% iron (Fe) ≤ 0.07% nickel (NiO-meter) ≤ 0.5% Sulfate (SO42-) ≤ 0.05% 
 Alkali and alkaline earth metal ≤ 0.5% copper (Cu) ≤ 0.3% Fineness (100 mesh sieve residue) ≤ 1% 
 Main Uses: mainly used for preparation of cobalt raw materials, preparation of cobalt for the production of tungsten-cobalt carbide, cobalt magnetic alloy, through the continued oxidation of the cobalt oxide is used as the cobalt lithium battery cathode materials used in the chemical industry as catalyst is also used as glass, enamel, ceramics, magnetic materials, adhesive agent, the color of sky blue, cobalt blue, cobalt green coloring agents, animal trace element nutrition agent.