1、真(zhen)鹽(yan)是一(yi)般(ban)使用機械化分裝(zhuang)進(jin)行(xing)加(jia)工，真(zhen)鹽(yan)的(de)包裝(zhuang)封口(kou)上，會有明顯的(de)線性凹凸紋，以便我(wo)們來(lai)識別(bie)，假(jia)鹽(yan)一(yi)般(ban)使用手(shou)工分裝(zhuang)進(jin)行(xing)加(jia)工，封口(kou)線的(de)凹凸紋一(yi)般(ban)呈(cheng)顆粒(li)狀。我(wo)們在購(gou)買時可以用手(shou)摸一(yi)下(xia)，大粒(li)鹽(yan)價格，真(zhen)鹽(yan)封口(kou)線的(de)邊緣(yuan)統稱為(wei)波浪形，而(er)工業鹽(yan)包裝(zhuang)袋采用普通(tong)切割，封口(kou)線上邊緣(yuan)一(yi)般(ban)比較(jiao)平滑。我(wo)們可以從包裝(zhuang)上進(jin)行(xing)區別(bie)。

2、12色防偽(wei)條碼的上方(fang)有(you)防偽(wei)標(biao)簽，我們可以用放大(da)鏡來進行觀察，而且防偽(wei)碼標(biao)簽內一(yi)般會藏有(you)很多(duo)信息，方(fang)形(xing)(xing)標(biao)簽邊(bian)(bian)角(jiao)圓滑(hua)，里邊(bian)(bian)有(you)一(yi)個另一(yi)個邊(bian)(bian)角(jiao)尖銳的小方(fang)形(xing)(xing)，左側兩個角(jiao)落分別(bie)寫著(zhu)“中國”和(he)“鹽(yan)業(ye)”，右側兩個角(jiao)落寫有(you)“湘”和(he)“鹽(yan)”。里邊(bian)(bian)會有(you)方(fang)形(xing)(xing)中心寫著(zhu)一(yi)個“碘”字。

廣(guang)泛用于化工(gong)行業(ye)鹽(yan)(yan)(yan)(yan)(yan)(yan)及鹽(yan)(yan)(yan)(yan)(yan)(yan)加工(gong)原料，生產(chan)，如(ru)氯，純堿等化工(gong)產(chan)品，其(qi)主要(yao)成(cheng)分是(shi)利用鹽(yan)(yan)(yan)(yan)(yan)(yan)氯和鈉。吃“鹽(yan)(yan)(yan)(yan)(yan)(yan)”，并(bing)在同(tong)行業(ye)中，“鹽(yan)(yan)(yan)(yan)(yan)(yan)”使(shi)用的(de)(de)是(shi)相同(tong)的(de)(de)化學成(cheng)分，但不(bu)同(tong)的(de)(de)目的(de)(de)。因為(wei)鹽(yan)(yan)(yan)(yan)(yan)(yan)是(shi)一(yi)種(zhong)天然產(chan)物(wu)，精制鹽(yan)(yan)(yan)(yan)(yan)(yan)鹽(yan)(yan)(yan)(yan)(yan)(yan)源自簡單的(de)(de)處理(li)，黑龍江大(da)粒(li)鹽(yan)(yan)(yan)(yan)(yan)(yan)，除(chu)了氯化鈉的(de)(de)主要(yao)成(cheng)分，但還含(han)有多種(zhong)雜質(zhi)組分，它不(bu)叫氯化鈉，并(bing)且約定(ding)是(shi)只有一(yi)個字“鹽(yan)(yan)(yan)(yan)(yan)(yan)“具(ju)體地稱為(wei)氯化鈉作為(wei)主要(yao)成(cheng)分，如(ru)鹽(yan)(yan)(yan)(yan)(yan)(yan)，海鹽(yan)(yan)(yan)(yan)(yan)(yan)，大(da)粒(li)鹽(yan)(yan)(yan)(yan)(yan)(yan)生產(chan)廠(chang)家，以(yi)及鹽(yan)(yan)(yan)(yan)(yan)(yan)，巖鹽(yan)(yan)(yan)(yan)(yan)(yan)，碘鹽(yan)(yan)(yan)(yan)(yan)(yan)，非碘鹽(yan)(yan)(yan)(yan)(yan)(yan)，大(da)粒(li)鹽(yan)(yan)(yan)(yan)(yan)(yan)批發，鹽(yan)(yan)(yan)(yan)(yan)(yan)，大(da)鹽(yan)(yan)(yan)(yan)(yan)(yan)，碎鹽(yan)(yan)(yan)(yan)(yan)(yan)，洗鹽(yan)(yan)(yan)(yan)(yan)(yan)。如(ru)果鹽(yan)(yan)(yan)(yan)(yan)(yan)等化學成(cheng)分，一(yi)定(ding)要(yao)告訴(su)他(ta)們特定(ding)的(de)(de)商(shang)品名或化學名，如(ru)純堿，碳酸氫(qing)鈉，能含(han)糊稱為(wei)“工(gong)業(ye)鹽(yan)(yan)(yan)(yan)(yan)(yan)。“

工(gong)(gong)業鹽(yan)(yan)在(zai)建材工(gong)(gong)業中(zhong)(zhong)制成的純堿，是生產(chan)玻璃(li)的主要原料；在(zai)熔制玻璃(li)時為了消除玻璃(li)液中(zhong)(zhong)的氣泡，工(gong)(gong)業鹽(yan)(yan)鹽(yan)(yan)也(ye)是常(chang)用(yong)消除氣泡的澄清劑中(zhong)(zhong)的成份；一般(ban)的粗陶器(qi)、陶質(zhi)磚瓦(wa)和缸器(qi)需(xu)用(yong)工(gong)(gong)業鹽(yan)(yan)作上釉劑；制工(gong)(gong)業鹽(yan)(yan)的廢渣(zha)（鹽(yan)(yan)石膏），以及鹵水(shui)凈(jing)化中(zhong)(zhong)產(chan)生的鈣鎂泥。工(gong)(gong)業鹽(yan)(yan)在(zai)工(gong)(gong)業生產(chan)中(zhong)(zhong)有廣泛(fan)的用(yong)途，但是切忌不可用(yong)于(yu)食品(pin)行業，一旦發(fa)生誤(wu)食須(xu)盡快(kuai)就(jiu)醫(yi)。