1.Top grade Ammonium Sulphate 2.Nitrogen :21%Min 3.Moisture:0 ... dissolved in distilled water, except the addition of arsenic and heavy metals in solution purification agents, filtration, evaporation, cooling crystallization, centrifugal separation, drying. Used ... in a dry, clean, covered containers, transfer to a safe placef waste disposal sites Top grade N21% caprolactam grade Ammonium Sulphate in ...