We offer ammonium persulphate ar (ammonium peroxodisulphate) (catalyst for polymerisation of acrylamide) (nh4)2s2o8 m.w. 228.19 minimum assay 99.0% maximum limits of impurities: water-insoluble matter 0.003% acidity(h2so4) 0.1% chloride(cl) 0.0005%...