... indexItemIndexAppearancewhite crystalline powderAssay, %98.5Free acid, %≤0.10Cl,%≤0.00004Heavy metals (Pb),%≤0.0005Fe,%≤0.0005Mn,%≤0.00005Moisture,%≤0.10Active oxygen,%≥6.912, Uses(1)Used ... use.6 Wash thoroughly after handling. Ammonium persulfate(7727-54-0)/Chemical for Industrial