Copper is a chemical element with symbol Cu. At room temperature copper is in solid state. It is one of the most industrially important metal, reddish, ductile, malleable, good conductor of electricity. Known since prehistory, copper is currently used for the production of electrically conductive materials (wire and cable), and metal alloys such as brass and bronze. The symptoms of Cuprum metallicum and Cuprum aceticum were grouped by their similarity (Hah, Allen, Hering).