Product Description of Ammonium Sulfate CAS#7783-20-2
Ammonium sulfate is one of the earliest nitrogen fertilizers developed and remains widely used worldwide. It is recognized as a conventional nitrogen fertilizer with a nitrogen content typically ranging from 20% to 30%. As a salt formed by the reaction of a strong acid and a weak base, it produces a mildly acidic aqueous solution. In addition to supplying nitrogen, ammonium sulfate also functions as an acidic fertilizer. However, prolonged and excessive application may contribute to soil acidification and compaction, making proper soil management essential.
Ammonium sulfate is not suitable for the production of organic fertilizers and should not be applied together with alkaline fertilizers, as the resulting double hydrolysis reaction can reduce its fertilizing efficiency. During the 1960s, it served as the dominant nitrogen fertilizer and was also an important source of sulfur for crop production. Although it was originally manufactured through the neutralization of ammonia with sulfuric acid, by-product ammonium sulfate has gradually become the primary source of commercial production.
At present, the majority of ammonium sulfate is recovered as a by-product from industrial processes including coking, caprolactam production, sulfuric acid tail-gas desulfurization, power plant flue gas desulfurization, acrylonitrile manufacturing, methyl methacrylate production, and zinc oxide processing. This production route supports the concept of converting industrial waste into valuable resources, improving resource utilization while promoting energy conservation and reducing emissions. As ammonia-based flue gas desulfurization technology continues to advance, the output of by-product ammonium sulfate from
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Chemical Properties of Ammonium Sulfate CAS#7783-20-2
| Melting point | >280 °C (dec.) (lit.) |
| density | 1.77 g/mL at 25 °C (lit.) |
| vapor pressure | <1 Pa (25 °C) |
| refractive index | n20/D 1.396 |
| Fp | 26 °C |
| storage temp | room temp |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Solid |
| Specific Gravity | 1.769 |
| color | Yellow to orange |
| Odor | Slight odor of ammonia |
| PH Range | 5 - 6 |
| PH | 5.0-6.0 (25℃, 1M in H2O) |
| Water Solubility | 77 g/100 mL (25 ºC) |
| λmax | λ: 260 nm Amax: ≤0.037 λ: 280 nm Amax: ≤0.030 |
| Merck | 14,555 |
| Stability | Stable. Contact with strong oxidizers may cause fire or explosion. Incompatible with strong bases. |
| InChIKey | BFNBIHQBYMNNAN-UHFFFAOYSA-N |
| LogP | -5.1 at 25℃ |
| CAS DataBase Reference | 7783-20-2(CAS DataBase Reference) |
| EPA Substance Registry System | Ammonium sulfate (7783-20-2) |
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Product Application of Ammonium Sulfate CAS#7783-20-2
Ammonium sulfate is widely used in biotechnology, pharmaceuticals, and chemical manufacturing. It is commonly applied in protein precipitation, chromatography, urine testing, biological reagent preparation, and culture media formulation.
In the pharmaceutical industry, it serves as a salting-out agent, a catalyst for food color production, a nutrient source for yeast cultivation, and an auxiliary agent in acid dyeing and leather processing.
It is also used in the production of hydrogen peroxide and ammonium persulfate, as well as in electroplating and other industrial applications.
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