The chemical formula for cobalt is its chemical symbol, Co. Since cobalt is a pure element, its chemical formula is identical to its chemical symbol.
Cobalt is the 27th member of the periodic table and is assigned the chemical symbol Co. The discovery of cobalt is credited to Georg Brandt, a Swedish chemist who discovered the element in 1735 by isolating it from bismuth and other metals. Brandt also demonstrated that cobalt compounds are the source of the blue colouring found in glass and ceramics. Cobalt is known to be ferromagnetic and weakly reducing. Its common oxidation states are +2 and +3.