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　　工業堿是(shi)重要的化(hua)(hua)(hua)工原料之一，廣泛應用于(yu)輕工日化(hua)(hua)(hua)、建材、化(hua)(hua)(hua)學工業、食(shi)品工業、冶金、紡織、石(shi)油、國防、醫藥等領(ling)域， 用作制造其他化(hua)(hua)(hua)學品的原料、清洗(xi)劑(ji)、洗(xi)滌劑(ji)，也用于(yu)照相術和分析(xi)領(ling)域。

　　絕大部(bu)分(fen)用(yong)(yong)于工(gong)(gong)業(ye)(ye)(ye)，一小(xiao)部(bu)分(fen)為民(min)用(yong)(yong)。在工(gong)(gong)業(ye)(ye)(ye)用(yong)(yong)純堿(jian)中，主要是輕工(gong)(gong)、建材、化(hua)學工(gong)(gong)業(ye)(ye)(ye)，約占2/3;其(qi)次是冶(ye)(ye)金、紡織、石油、國防、醫(yi)藥及其(qi)它工(gong)(gong)業(ye)(ye)(ye)。玻璃工(gong)(gong)業(ye)(ye)(ye)是純堿(jian)的(de)(de)最大消(xiao)(xiao)費部(bu)門(men)，每噸(dun)玻璃消(xiao)(xiao)耗(hao)純堿(jian)0.2噸(dun)。化(hua)學工(gong)(gong)業(ye)(ye)(ye)用(yong)(yong)于制水(shui)玻璃、重鉻(ge)酸鈉、硝(xiao)酸鈉、氟化(hua)鈉、小(xiao)蘇打(da)、硼砂、磷(lin)酸三鈉和污(wu)水(shui)處理(li)等(deng)。冶(ye)(ye)金工(gong)(gong)業(ye)(ye)(ye)用(yong)(yong)作冶(ye)(ye)煉助熔(rong)劑(ji)、選(xuan)礦用(yong)(yong)浮選(xuan)劑(ji)，煉鋼和煉銻用(yong)(yong)作脫硫劑(ji)。印染工(gong)(gong)業(ye)(ye)(ye)用(yong)(yong)作軟水(shui)劑(ji)。制革工(gong)(gong)業(ye)(ye)(ye)用(yong)(yong)于原料皮的(de)(de)脫脂(zhi)、中和鉻(ge)鞣革和提高鉻(ge)鞣液堿(jian)度。還用(yong)(yong)于生(sheng)產合(he)成洗滌劑(ji)添加(jia)劑(ji)三聚磷(lin)酸鈉和其(qi)他磷(lin)酸鈉鹽等(deng)。食(shi)用(yong)(yong)級純堿(jian)用(yong)(yong)于生(sheng)產味精、面(mian)食(shi)等(deng)。