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Ammonium sulfate (specification)
Ammonium sulphate fertilizer is a widely used, inorganic soil supplement that has particular benefits when applied to alkaline soils. The active ingredients in it are nitrogen and sulfur. Correct use of this fertilizer maintains healthy nitrogen levels in the soil and, in the case of alkaline soils, helps to maintain a good pH balance. When used in excess, however, it can cause a range of undesirable plant conditions, such as excessive leaf growth, weak plant bodies, and excessive thatch in lawns. Several countries have also instituted a ban on this form of fertilizer due to its use as an explosives component by terrorist groups.
What Is Ammonium Sulfate?
The chemical compound ammonium sulfate is primarily used in fertilizers but is important in other industries as well. While it isn’t considered highly hazardous to humans, there are some important precautions to take if you’re using it.
Chemical Properties
Ammonium sulfate, also called diammonium sulfate or sulfuric acid diammonium salt, is a white crystalline solid with no smell. It tastes salty. The compound dissolves easily in water but will not dissolve in alcohol or acetone. It readily absorbs water, so if it’s exposed to moist air, it will “scab” on the damp surfaces. When ammonium sulfate reacts with alkaline substances, it gives off ammonia gas. Finally, ammonium sulfate is a fertilizer that’s sometimes used in making homemade explosives.
Use in Fertilizers
Ammonium sulfate is used most commonly as an artificial fertilizer for alkaline soils. When introduced into damp soil, an ammonium ion is released. This creates a small amount of acid, which lowers the pH balance of the soil. It also contributes nitrogen, which aids in plant growth. It dissolves relatively slowly, which makes it cheaper than some other artificial fertilizers. Ammonium sulfate is also used as an herbicide because it will burn the leaves of plants and either kill them outright or at least weaken them for easy removal.
| Parameter | Unit | Guarantee | Test Result | Method |
| Nitrogen | % | 20.5 min | 21 | GB/T 535-1955 |
| Moisture | % | 1.0 max | 0.75 | GB/T 535-1955 |
| Free Acid | % | 0.2 max | 0.18 | GB/T 535-1955 |
| Grade Standard | - | Caprolactam | Caprolactam | GB/T 535-1955 |
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