工業鹽是化工的基本原料之一，其主要成分有氯化鈉、亞硝酸鈉等，又稱氯化鈉、亞硝酸鈉等。“化工之母”鹽酸、燒堿、純堿、氯化銨、氯氣等主要產品以工業鹽為原料。

鹽酸、燒堿、純堿、氯化銨、氯氣等主要化工產品主要以工業鹽為原料生產。此外，還用于肥皂制造、陶瓷、玻璃生產、日用化工、石油鉆探、鉆井工作液、完井液、石化脫水液、建筑行業早強劑、涂料凝固劑、化工無機化工原料和硫酸根去除劑、褐藻酸鈉凝固劑、防治小麥、蘋果、卷心菜等腐爛和食品防腐劑、金屬鈉等鈉化合物、鋼熱處理介質等。此外，鹽在水處理、公路除雪、制冷等方面也有廣泛的應用。
“工業鹽(yan)(yan)(yan)(yan)(yan)”這種說(shuo)法是不(bu)(bu)科學的(de)。在(zai)工業化(hua)時代之前(qian)，人們所說(shuo)的(de)鹽(yan)(yan)(yan)(yan)(yan)特(te)別是生活中(zhong)(zhong)使用(yong)的(de)鹽(yan)(yan)(yan)(yan)(yan)，而不(bu)(bu)是化(hua)學科學中(zhong)(zhong)使用(yong)的(de)鹽(yan)(yan)(yan)(yan)(yan)“鹽(yan)(yan)(yan)(yan)(yan)”。然而，在(zai)現實生活中(zhong)(zhong)，相當一(yi)部分(fen)人的(de)文化(hua)水平并不(bu)(bu)，分(fen)不(bu)(bu)清生活中(zhong)(zhong)的(de)人“食(shi)鹽(yan)(yan)(yan)(yan)(yan)”和化(hua)學中(zhong)(zhong)的(de)“鹽(yan)(yan)(yan)(yan)(yan)”實質上的(de)差異(yi)，甚(shen)至(zhi)發(fa)生了許多誤(wu)食(shi)有毒鹽(yan)(yan)(yan)(yan)(yan)、群(qun)體中(zhong)(zhong)毒的(de)事件。
亞硝酸(suan)鹽(yan)還原活(huo)潑(po)，腌(a)肉(rou)，即使(shi)是不新(xin)鮮(xian)的(de)肉(rou)制品，也(ye)(ye)能使(shi)肉(rou)色鮮(xian)艷。生活(huo)中(zhong)(zhong)，一些無(wu)知的(de)商家用工業(ye)鹽(yan)腌(a)制不新(xin)鮮(xian)的(de)肉(rou)制品，導(dao)致亞硝酸(suan)鹽(yan)群體中(zhong)(zhong)毒，因(yin)此“工業(ye)鹽(yan)“人體長期(qi)攝入亞硝酸(suan)鹽(yan)也(ye)(ye)會增(zeng)加癌變的(de)風(feng)險，嚴(yan)禁食用工業(ye)鹽(yan)。
工(gong)(gong)(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)在工(gong)(gong)(gong)(gong)(gong)業(ye)(ye)(ye)上(shang)得到了廣泛(fan)(fan)的(de)應用(yong)。它是(shi)化(hua)(hua)(hua)工(gong)(gong)(gong)(gong)(gong)行(xing)業(ye)(ye)(ye)的(de)基本原料(liao)(liao)之一，被稱為化(hua)(hua)(hua)工(gong)(gong)(gong)(gong)(gong)行(xing)業(ye)(ye)(ye)的(de)基本原料(liao)(liao)，被稱為“化(hua)(hua)(hua)工(gong)(gong)(gong)(gong)(gong)之母”。鹽(yan)(yan)酸、燒堿(jian)(jian)、純堿(jian)(jian)、氯(lv)化(hua)(hua)(hua)銨、lv氣(qi)等(deng)(deng)。是(shi)基礎化(hua)(hua)(hua)工(gong)(gong)(gong)(gong)(gong)的(de)主(zhu)要(yao)(yao)產品(pin)，主(zhu)要(yao)(yao)由工(gong)(gong)(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)生產。工(gong)(gong)(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)主(zhu)要(yao)(yao)用(yong)于(yu)制(zhi)堿(jian)(jian)、制(zhi)皂(zao)、生產lv氣(qi)和氫氧化(hua)(hua)(hua)鈉(na)也廣泛(fan)(fan)應用(yong)于(yu)冶金(jin)、制(zhi)革、制(zhi)藥、農業(ye)(ye)(ye)、畜牧業(ye)(ye)(ye)和漁業(ye)(ye)(ye)。此外，工(gong)(gong)(gong)(gong)(gong)業(ye)(ye)(ye)鹽(yan)(yan)還廣泛(fan)(fan)應用(yong)于(yu)食品(pin)、飼料(liao)(liao)、皮(pi)革、陶(tao)瓷(ci)、玻璃、肥皂(zao)、染料(liao)(liao)、油、礦冶、醫藥等(deng)(deng)工(gong)(gong)(gong)(gong)(gong)業(ye)(ye)(ye)部(bu)門，以及水處(chu)理、制(zhi)冰、道路(lu)除(chu)雪等(deng)(deng)。
亞硝酸鈉(na)是(shi)工(gong)(gong)業鹽的主(zhu)要成分(fen)。ya硝酸鹽有毒，但化(hua)學性質相對穩定。工(gong)(gong)業鹽廣泛應(ying)用于(yu)食(shi)品加(jia)工(gong)(gong)行業的著色劑和(he)(he)防腐劑。可用于(yu)增色、調味(wei)、殺菌。在化(hua)工(gong)(gong)行業中，原鹽和(he)(he)加(jia)工(gong)(gong)鹽廣泛用作生(sheng)產氯、漂(piao)白粉、燒堿、純堿等化(hua)工(gong)(gong)產品的原料。鹽的主(zhu)要成分(fen)是(shi)氯和(he)(he)鈉(na)。
食用(yong)“鹽(yan)(yan)(yan)(yan)”和(he)工業(ye)“鹽(yan)(yan)(yan)(yan)”化學成分相同(tong)，但(dan)用(yong)途不同(tong)。工業(ye)鹽(yan)(yan)(yan)(yan)不能直(zhi)接供(gong)人(ren)們食用(yong)，但(dan)可以(yi)作(zuo)(zuo)(zuo)為工業(ye)上(shang)的(de)(de)非食用(yong)鹽(yan)(yan)(yan)(yan)，統稱為工業(ye)鹽(yan)(yan)(yan)(yan)。除氯化鈉外，工業(ye)鹽(yan)(yan)(yan)(yan)中的(de)(de)原鹽(yan)(yan)(yan)(yan)還含有鎂、鉀、硫(liu)、硼(peng)、碘等(deng)作(zuo)(zuo)(zuo)物所需的(de)(de)少量(liang)(liang)營養物質，對(dui)喜鈉作(zuo)(zuo)(zuo)物有很*的(de)(de)作(zuo)(zuo)(zuo)用(yong)。如甜菜(cai)、芹菜(cai)等(deng)作(zuo)(zuo)(zuo)物，使用(yong)農(nong)用(yong)鹽(yan)(yan)(yan)(yan)不僅可以(yi)提(ti)高(gao)產(chan)量(liang)(liang)，還可以(yi)提(ti)高(gao)甜菜(cai)、芹菜(cai)等(deng)喜鈉作(zuo)(zuo)(zuo)物的(de)(de)質量(liang)(liang)。但(dan)在(zai)稻田中不宜長期過量(liang)(liang)使用(yong)農(nong)用(yong)鹽(yan)(yan)(yan)(yan)，否則鈉離子會破壞土壤的(de)(de)良(liang)*結構，導(dao)致(zhi)干燥時(shi)板結開(kai)裂，濕時(shi)腐爛粘稠，滲透性(xing)差(cha)，耕作(zuo)(zuo)(zuo)性(xing)差(cha)。因此，原鹽(yan)(yan)(yan)(yan)可以(yi)作(zuo)(zuo)(zuo)為輔助肥料，在(zai)增(zeng)加有機(ji)肥施用(yong)量(liang)(liang)的(de)(de)基礎上(shang)合理適(shi)量(liang)(liang)施用(yong)。它不應該使用(yong)更多或更多年。