Ammonium sulfate(SA) Ammonia 20.5%min Moisture 1.0%min Ammonium sulfate :SA ItemIndexAmmonia 20.5%minMoisture1.0%maxFree Acid 0.03%maxFe0.007%maxAr0.0005%maxWater-insoluble0.03%maxHeavy Metal0.005%max[Storage & transportation] Stored in dry, cool airiness place, far away from heat, avoid insolation, sign with no moisture and no insolation[Packing] plastic woven bag with PE liner.n.w.20/25/50KG.