紫(zi)銅(tong)(tong)(tong)又(you)(you)名(ming)紅(hong)(hong)銅(tong)(tong)(tong)就是(shi)銅(tong)(tong)(tong)單(dan)質，因其顏色(se)為紫(zi)紅(hong)(hong)色(se)而得名(ming)。各種性質見(jian)銅(tong)(tong)(tong)。紫(zi)銅(tong)(tong)(tong)是(shi)工業純銅(tong)(tong)(tong)，其熔點為1083℃，無同素(su)異構轉變，相對密度為8.9，為鎂的五倍。同體積的質量比普(pu)通鋼重(zhong)約15%。因其具(ju)有(you)玫瑰紅(hong)(hong)色(se)，表面形成(cheng)氧化膜(mo)后(hou)呈紫(zi)色(se)，故一般稱為紫(zi)銅(tong)(tong)(tong)。它是(shi)含有(you)一定氧的銅(tong)(tong)(tong)，因而又(you)(you)稱含氧銅(tong)(tong)(tong)。