Co(HCO3)2 is cobalt(II) bicarbonate, a chemical compound consisting of cobalt, hydrogen, carbon, and oxygen. It typically appears as a blue or pink solid and is soluble in water, where it can dissociate into cobalt ions and bicarbonate ions. Cobalt(II) bicarbonate is often encountered in the context of cobalt chemistry and may be used in various applications, including as a precursor in the synthesis of other cobalt compounds. However, it is relatively unstable and can decompose into cobalt carbonate and carbon dioxide upon heating.