Ammonium Sulfate:-
Ammonium sulfate [(NH4)2SO4] was one of the first and most widely used nitrogen (N) fertilizers for crop production. It is now less commonly used, but especially valuable where both N and sulfur (S) are required. Its high solubility provides
versatility for a number of agricultural applications.
Ammonium sulfate (IUPAC-recommended spelling; also ammonium sulphate in British English), (NH4)2SO4, is an inorganic saltwith a number of commercial uses. The most common use is as a soil fertilizer. It contains 21% nitrogen and 24% sulfur.
Specification:-
Ammonium sulphate(Industrial premium grade) Pharmaceutical: |
Appearance: |
White crystal without visible mechanical impurities |
Nitrogen content(N): |
21.0% min |
Water content(H2O): |
0.2% max |
Free acid(H2SO4): |
0.03% max |
Iron(Fe): |
0.007% max |
Arsenic(As): |
0.00005% max |
Heavy metal(based on Pb): |
0.005% max |
Insoluble substance in water: |
0.01% max |
Ammonium sulphate(Industrial first grade): |
Appearance: |
Without visible mechanical impurities |
Nitrogen content(N): |
21.0% min |
Water content(H2O): |
0.3% max |
Free acid(H2SO4): |
0.05% max |
Ammonium sulphate(Agriculture grade): |
Appearance: |
Without visible mechanical impurities |
Nitrogen content(N): |
20.5% min |
Water content(H2O): |
1.0%max |
Free acid(H2SO4): |
0.2%max |
Application:-
The primary use of ammonium sulfate is as a fertilizer for alkaline soils. In the soil the ammonium ion is released and forms a small amount of acid, lowering the pH balance of the soil, while contributing essential nitrogen for plant growth. The main disadvantage to the use of ammonium sulfate is its low nitrogen content relative to ammonium nitrate, which elevates transportation costs.
It is also used as an agricultural spray adjuvant for water soluble insecticides, herbicides, and fungicides. There, it functions to bind iron and calcium cations that are present in both well water and plant cells. It is particularly effective as an adjuvant for 2,4-D (amine),glyphosate, and glufosinate herbicides.
Ammonium sulfate is extremely soluble in water and so can make very concentrated solutions, which can "salt out" proteins, causing their precipitation at particular concentrations. This provides a convenient and simple means to fractionate complex protein mixtures. As such, ammonium sulfate is also listed as an ingredient for many United States vaccines per the Center for Disease Control.
Ammonium sulfate is commonly added to bread products as a dough conditioner. It is also a component in fire extinguisher powder and flame-proofing agents. It is used for many applications in the chemical, wood pulp, textile, and pharmaceutical industries.
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