電鍍工(gong)(gong)(gong)業(ye)用(yong)(yong)(yong)于配制(zhi)電鍍液，能與鐵(tie)形成(cheng)絡臺物。毛(mao)紡工(gong)(gong)(gong)業(ye)用(yong)(yong)(yong)作(zuo)(zuo)羊毛(mao)脫脂劑(ji)(ji)(ji)(ji)和(he)漂(piao)毛(mao)劑(ji)(ji)(ji)(ji)。造紙工(gong)(gong)(gong)業(ye)用(yong)(yong)(yong)于紙張和(he)植物纖維的漂(piao)白(bai)。印(yin)染(ran)工(gong)(gong)(gong)業(ye)用(yong)(yong)(yong)作(zuo)(zuo)印(yin)染(ran)、精漂(piao)時的助劑(ji)(ji)(ji)(ji)。日化工(gong)(gong)(gong)業(ye)用(yong)(yong)(yong)作(zuo)(zuo)牙(ya)膏添加(jia)劑(ji)(ji)(ji)(ji)，能與磷酸氫鈣(gai)形成(cheng)膠體(ti)并起到(dao)穩定作(zuo)(zuo)用(yong)(yong)(yong)，還可用(yong)(yong)(yong)于合(he)成(cheng)洗(xi)滌劑(ji)(ji)(ji)(ji)和(he)生產洗(xi)頭膏等(deng)產品(pin)。水(shui)處理中(zhong)(zhong)作(zuo)(zuo)為(wei)(wei)軟(ruan)水(shui)劑(ji)(ji)(ji)(ji)。機械加(jia)工(gong)(gong)(gong)中(zhong)(zhong)作(zuo)(zuo)為(wei)(wei)除(chu)銹劑(ji)(ji)(ji)(ji)。化工(gong)(gong)(gong)生產中(zhong)(zhong)用(yong)(yong)(yong)作(zuo)(zuo)分散(san)劑(ji)(ji)(ji)(ji)和(he)乳(ru)化劑(ji)(ji)(ji)(ji)。還可用(yong)(yong)(yong)于水(shui)處理劑(ji)(ji)(ji)(ji)、石油(you)鉆探(tan)等(deng)方(fang)面，在食(shi)品(pin)工(gong)(gong)(gong)業(ye)中(zhong)(zhong)作(zuo)(zuo)為(wei)(wei)品(pin)質改良劑(ji)(ji)(ji)(ji)、乳(ru)化劑(ji)(ji)(ji)(ji)、緩沖劑(ji)(ji)(ji)(ji)、螯合(he)劑(ji)(ji)(ji)(ji)等(deng)。

焦磷酸(suan)鈉有(you)(you)軟化水的(de)(de)功能(neng)外(wai)，還能(neng)再(zai)溶(rong)(rong)解(jie)鈣、鎂的(de)(de)不溶(rong)(rong)性鹽類，如衣服纖維中，夾雜住不溶(rong)(rong)性鈣皂或(huo)其(qi)他金(jin)屬皂形(xing)成(cheng)的(de)(de)污(wu)垢，它能(neng)使(shi)(shi)其(qi)再(zai)溶(rong)(rong)解(jie)而提高去污(wu)能(neng)力。另(ling)外(wai)，焦磷酸(suan)鈉有(you)(you)反絮凝作用(yong)，使(shi)(shi)油(you)脂起乳(ru)化作用(yong)，這稱為膠溶(rong)(rong)性質。亦能(neng)使(shi)(shi)表面(mian)(mian)活性劑溶(rong)(rong)液進一步(bu)降低表面(mian)(mian)張(zhang)力和(he)界面(mian)(mian)張(zhang)力，起到洗(xi)滌的(de)(de)助洗(xi)作用(yong)

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