氯(lv)(lv)(lv)化(hua)(hua)钴(gu)是(shi)红色(se)单(dan)斜(xie)晶(jing)系结晶(jing)，易潮解。熔(rong)点724℃，易溶于(yu)水，溶于(yu)乙醇(chun)、醚、丙酮。无水氯(lv)(lv)(lv)化(hua)(hua)钴(gu)化(hua)(hua)合物(wu)分(fen)子式CoCl2，含(han)(han)钴(gu)45.4%，含(han)(han)氯(lv)(lv)(lv)54.6%。一水化(hua)(hua)合物(wu)分(fen)子式CoCl2·H2O，含(han)(han)钴(gu)39.9%。六水化(hua)(hua)合物(wu)分(fen)子式CoCl2·6H2O，含(han)(han)钴(gu)24.8%。氯(lv)(lv)(lv)化(hua)(hua)钴(gu)主(zhu)要(yao)用(yong)(yong)(yong)(yong)于(yu)制(zhi)取(qu)氧化(hua)(hua)钴(gu)和金属(shu)钴(gu)，作(zuo)(zuo)合金材(cai)料的(de)(de)电子材(cai)料，少量(liang)在(zai)(zai)仪器制(zhi)造(zao)中(zhong)用(yong)(yong)(yong)(yong)作(zuo)(zuo)生产气压计(ji)、比重计(ji)、干湿指示剂等(deng)。陶瓷工业用(yong)(yong)(yong)(yong)作(zuo)(zuo)着色(se)剂。涂料工业用(yong)(yong)(yong)(yong)于(yu)制(zhi)造(zao)油漆(qi)催干剂。畜牧业中(zhong)用(yong)(yong)(yong)(yong)于(yu)配置(zhi)复合饲料。酿造(zao)工业用(yong)(yong)(yong)(yong)作(zuo)(zuo)啤酒泡沫稳定剂。化(hua)(hua)学反应中(zhong)用(yong)(yong)(yong)(yong)作(zuo)(zuo)催化(hua)(hua)剂。分(fen)折化(hua)(hua)学中(zhong)用(yong)(yong)(yong)(yong)于(yu)点滴(di)分(fen)析(xi)锌，单(dan)倍(bei)体育种，此外，还用(yong)(yong)(yong)(yong)于(yu)制(zhi)造(zao)隐显(xian)墨水、氯(lv)(lv)(lv)化(hua)(hua)钴(gu)试纸（在(zai)(zai)干燥时是(shi)蓝色(se)，潮湿时转(zhuan)变为粉红色(se)），变色(se)硅胶(jiao)等(deng)。还用(yong)(yong)(yong)(yong)作(zuo)(zuo)氨的(de)(de)吸(xi)收剂。