Cov khoom siv feem ntau siv hauv "cov txheej txheem qhuav" cov kuab tshuaj feem ntau yog cov hauv qab no:
(1) Siv hydrochloric acid (HCl) nrog ib tug concentration ntawm 31% (360 grams ib liter, nrog ib tug Baumé degree saum toj no 19) ncaj qha raws li cov kuab tshuaj;
(2) Siv cov tshuaj aqueous ntawm zinc chloride (ZnCl₂) ua cov kuab tshuaj;
(3) Siv cov tshuaj aqueous ntawm ammonium chloride (NH₄Cl) ua cov kuab tshuaj;
(4) Siv cov tshuaj aqueous ntawm cov ntsev ntawm ammonium chloride thiab zinc chloride ua cov kuab tshuaj.
Nyob rau hauv Tuam Tshoj lub kub-dip galvanized steel yeeb nkab factories, cov kuab tshuaj siv feem ntau yog ib tug aqueous tov ntawm complex ntsev ntawm ammonium chloride thiab zinc chloride.
