工(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)(yan)在(zai)(zai)建材(cai)工(gong)(gong)(gong)業(ye)(ye)(ye)中(zhong)制成(cheng)的(de)純堿，工(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)(yan)銷售，是(shi)生產玻璃的(de)主要原(yuan)料；在(zai)(zai)熔制玻璃時為了(le)消除(chu)玻璃液中(zhong)的(de)氣泡，工(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)(yan)鹽(yan)(yan)(yan)也是(shi)常用(yong)(yong)消除(chu)氣泡的(de)澄(cheng)清劑中(zhong)的(de)成(cheng)份(fen)；一般的(de)粗陶(tao)器(qi)、陶(tao)質磚瓦和缸器(qi)需用(yong)(yong)工(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)(yan)作上釉劑；制工(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)(yan)的(de)廢渣（鹽(yan)(yan)(yan)石(shi)膏），以及鹵水凈(jing)化中(zhong)產生的(de)鈣鎂(mei)泥。工(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)(yan)在(zai)(zai)工(gong)(gong)(gong)業(ye)(ye)(ye)生產中(zhong)有廣泛的(de)用(yong)(yong)途(tu)，工(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)(yan)廠家，但是(shi)切(qie)忌不可用(yong)(yong)于(yu)食(shi)品行(xing)業(ye)(ye)(ye)，一旦發生誤食(shi)須盡快就醫(yi)。

化(hua)學工業中大量使用原(yuan)(yuan)鹽(yan)和(he)(he)加工鹽(yan)為(wei)原(yuan)(yuan)料(liao)，純(chun)堿等化(hua)工產(chan)品，是(shi)利用鹽(yan)中主(zhu)要成(cheng)分氯(lv)元素和(he)(he)鈉(na)元素。因為(wei)原(yuan)(yuan)鹽(yan)是(shi)自然界的(de)產(chan)品，精制鹽(yan)也是(shi)原(yuan)(yuan)鹽(yan)的(de)簡(jian)單加工而得，除了(le)主(zhu)要成(cheng)分氯(lv)化(hua)鈉(na)外，還(huan)含有多種雜質成(cheng)分，所以不能稱其(qi)為(wei)氯(lv)化(hua)鈉(na)，而約(yue)定俗成(cheng)只用一個字“鹽(yan)”。

工業用鹽主要(yao)區分為兩種：一(yi)(yi)種是(shi)NaNO?（好像我(wo)們以(yi)前(qian)的課本上也是(shi)這麼說的）；另(ling)一(yi)(yi)種是(shi)NaCl。

工(gong)(gong)業(ye)(ye)鹽(yan)(yan)：工(gong)(gong)業(ye)(ye)鹽(yan)(yan)在工(gong)(gong)業(ye)(ye)上的用(yong)途很廣，是化學工(gong)(gong)業(ye)(ye)的基(ji)本(ben)原(yuan)料(liao)之一，工(gong)(gong)業(ye)(ye)鹽(yan)(yan)生(sheng)產(chan)廠家(jia)，其主(zhu)要(yao)成分(fen)是氯化鈉(na)，工(gong)(gong)業(ye)(ye)鹽(yan)(yan)，被稱為“化學工(gong)(gong)業(ye)(ye)”。基(ji)本(ben)化學工(gong)(gong)業(ye)(ye)主(zhu)要(yao)產(chan)品中(zhong)的鹽(yan)(yan)酸(suan)、純堿、氯化鈉(na)等主(zhu)要(yao)是用(yong)工(gong)(gong)業(ye)(ye)鹽(yan)(yan)為原(yuan)料(liao)生(sheng)產(chan)的。

食(shi)用(yong)鹽(yan)(yan)是指從海水、地下巖(礦)鹽(yan)(yan)沉(chen)積(ji)物(wu)、天(tian)然鹵(咸)水等獲得的(de)以氯化鈉為主要成分的(de)經過(guo)加工的(de)食(shi)用(yong)鹽(yan)(yan)，食(shi)用(yong)鹽(yan)(yan)是烹飪中常(chang)用(yong)的(de)調味料之(zhi)一(yi)，也是人體正常(chang)的(de)生理活(huo)動(dong)不可缺的(de)物(wu)質，由于食(shi)用(yong)鹽(yan)(yan)在我們日常(chang)飲食(shi)中的(de)重要作用(yong)，我國對食(shi)用(yong)鹽(yan)(yan)的(de)質量有嚴格的(de)規(gui)定。