... % water soluble, no impurity 4.Large stock&fast delivery Application:It is used in metallurgy, medicine, leather, wood preservative, textile, plating ... of commercial uses. The most common use is as a soil fertilizer. It contains 21% nitrogen as ammonium cations, and ... 005%maxWater insolubles0.01%maxNote: When ammonium sulphate is used in agriculture,it is not necessary to check the content of Fe,As ...