Copper is a tough, soft, and ductile purple-red and shiny metal. Because it has a rose-red color and is purple after forming an oxide film on the surface, it is generally called copper. It is copper containing a certain amount of oxygen, and thus It is called oxygenated copper. Copper is an industrial pure copper with a melting point of 1083 ° C, no isomeric transformation, a relative density of 8.9, five times that of magnesium.