High-purity Cobalt(II,III) Oxide (Co₃O₄), 99.5% pure with 325 mesh particle size. Ideal for catalysts, batteries, and ceramic applications. https://www.noahchemicals.com/product/cobalt-ii-iii-oxide-99-5-pure-325-mesh-cobaltous-cobaltic-oxide-co%e2%82%83o%e2%82%84/