... 1, Technical indexItemIndexAppearancewhite crystalline powderAssay, %99.0Free acid, %≤0.01Cl,%≤0.00004Heavy metals (Pb),%≤0.0005Fe,%≤0.0005Mn,%≤0.00005Moisture,%≤0.10Active oxygen,%≥6.652, Uses (1 ... not in use.6 Wash thoroughly after handling. Soduim Persulfate(99.0%)/Chemical for Industrial