紫(zi)銅(tong)(tong)又名紅(hong)銅(tong)(tong)就是(shi)(shi)(shi)銅(tong)(tong)單質(zhi)，因(yin)其顏色(se)為(wei)紫(zi)紅(hong)色(se)而(er)得名。各種性質(zhi)見銅(tong)(tong)。紫(zi)銅(tong)(tong)是(shi)(shi)(shi)工業純銅(tong)(tong)，其熔(rong)點為(wei)1083℃，無同(tong)素異構轉變，相對密度(du)為(wei)8.9，為(wei)鎂(mei)的(de)(de)五倍。同(tong)體積的(de)(de)質(zhi)量比普通鋼重約15%。因(yin)其具有玫瑰紅(hong)色(se)，表(biao)面(mian)形成氧(yang)化膜后呈紫(zi)色(se)，故(gu)一般稱為(wei)紫(zi)銅(tong)(tong)。它(ta)是(shi)(shi)(shi)含有一定氧(yang)的(de)(de)銅(tong)(tong)，因(yin)而(er)又稱含氧(yang)銅(tong)(tong)。