The flocculation of aluminium alum: Al2 (SO4) 3.18 H2O, NaAlO2, Al2 (OH) 3Cl, KAl (SO4) 2.12 H2O, NH4Al (SO4); Iron alum: Fe2 (SO4) 3.2 H2O, H2O 4.7 FeSO, FeCl3 or flocculation not dissociation, high molecular form of natural origin or synthetics.
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