1.High purity 99.0% 2.Prompt and safely shipment 3.Factory visit and sample ... : ItemIndexAppearanceWhite crystalline powderAssay, %99.0Free acid, %≤0.01Cl,%≤0.0001Heavy metals (Pb),%≤0.0005Fe,%≤0.0005Mn,%≤0.00005Moisture,%≤0.05Active oxygen,%≥6.65Application:Sodium persulfate is ... solution has a bleaching and slightly corroding effect. factory directly 9.0 sodium persulfate