This product is widely used in the metallurgical products of hard alloys, diamond tools, high temperature alloys and magnetic materials; and in the chemicals ofrechargeable batteries, blasting pharmaceuticals, rocket fuel and medicine. Dissolved in acid, and easy to be oxidized in the moist air.Property: Grey powder with irregular form and magnetism. Dissolved in acid, and easy to be oxidized in the moist air Particle Size: -200mesh/-300mesh(Co powder), 1 2micron ( Fine Co powder), &le0.5micron ( Fine Co powder) Bulk Density: &le0.72 g/cc (Co powder), 0.5 0.7 g/cc (Fine/Super fine Co powder) Country of Origin:China