Dear Sirs,This is Maggie from Ningbo Coboto Cobalt & Nickel. Co., ltd which is located in China. Our factory is specialize in the COBALT OXIDE, now it is exporting to Korea, France, England and so on, the goods is competitive prices and good quality, the detailed information about the goods, pls check the following:Molecular formula: Co3o4Molecular weight: 74.93Character: Gray PowderUsage: Used for making paint pigments, ceramic glazes and cobalt catalystsStorage: At a dry place with good ventilation, avoid heat and humidityStandard in force: Enterprise standardPackage: in bucket, 25kg or 50kg per bucket, or subject to clients’ requirementsChemical CompositionCo≥72.50Ni≤0.0100 Fe≤0.0060Cu≤0.0020 Ca≤0.0070 Mg≤0.0070 Pb≤0.0050 Na≤0.050H2O≤0.08Cl≤0.0500Mn≤0.0080 If you are interested in ,pls do not hesitate to contact with me,thank you very much