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.
Easily soluble in water, insoluble in alcohol, acetone, can react with alkalis and release the ammonia gas.
Hygroscopic, easily become caking after moisture absorption.
Melting point | 235 °C (455 °F; 508 K) (decomposes) |
Solubility in water |
70.6 g/100 mL (0 °C)
74.4 g/100 mL (20 °C)
103.8 g/100 mL (100 °C) |
| Solubility | insoluble in acetone, alcoholand ether |
Critical relative humidity |
79.2% (30 °C) |
Specification of Ammonium Sulphate Granular:-
Parameters |
Standard
based on GB535-1995 |
Test Result |
Appearance |
no visible
mechanical impurity |
no visible
mechanical impurity |
Nitrogen (N)content% ≥ |
20.5 |
20.68 |
Moisture (H2O),% ≤ |
1.5 |
1.0 (dry basis) |
Free acidity(H2SO4),% ≤ |
0.2 |
0.18 |
Note: When ammonium sulfate is used as fertilizer in agriculture, it is not necessary to check the content of Fe, As, heavy metal and water insoluble matter.
Sulfur: 23%min
Granularity: 2-5mm 90% min
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 , 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.
Straightly used as fertilizer or as for making Bulk Blending fertilizer.
Advantage: Dry enough, less powder, hard enough.
Storage and Transportation
Ammonium Sulphate should be stored in cool, dry, ventilated warehouse, avoid to be exposed in sunshine, rain, and high temperature.
During the transportation: avoid shipment with acid, alkali stuff, prevent it from sunlight and rain and do not damage the packing bags
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