Ammonium persulfate is a white, crystalline, odourless salt. It is used as initiator for the polymerisation of monomers and as a strong oxidizing agent in many application. It has the particular advantage of being almost non-hygroscopic, of having a particularly good storage stability as a result of its extremely high purity and of being easy and safe to handle. Items Specifications assay Min 98.5% Active oxygen Min 6.9% Residue after ignition as SO4 Max 0.02% chloride and chlorate( as CI) Max 0.001% Manganese( Mn) Max 0.00005% Iron( Fe) Max 0.0005% Heavy metals( Pb) Max 0.0005% Moisture Max 0.10%