|Molecular formula||(NH 4 ) 2 SO 4|
odorless and colorless crystalline solid
|External identifiers / databases|
|Molar mass||132.14 g mol −1|
1.77 g cm −3
> 235 ° C
easily soluble in water:
|ΔH f 0||
−1180 kJ mol −1
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .|
In nature, ammonium sulfate is known as a rare mineral under the name of mascagnin.
Ammonium sulfate is not very hygroscopic , aqueous solutions are weakly acidic. Like many ammonium salts, it can react with sodium nitrite or potassium nitrite at room temperature to form flames or even to explode.
Extraction and presentation
In the chemical industry, it is used, among other things, as a precipitant for protein , as a flotation agent and for the production of fire extinguishing powder and flame retardants . The leather industry uses it for staining, the paper industry for flame-retardant papers .
In biochemistry , ammonium sulfate is the salting out of proteins ( ammonium sulfate precipitation ) was used. In addition, cells and tissue are preserved in a saturated ammonium sulfate solution to protect the RNA from degradation.
- Entry on E 517: Ammonium sulphate in the European database for food additives, accessed on August 11, 2020.
- Entry on AMMONIUM SULFATES in the CosIng database of the EU Commission, accessed on February 26, 2020.
- Robert K. Scopes: Protein Purification. Springer Science & Business Media, 2013, ISBN 978-1-4757-2333-5 , p. 81
- Data sheet ammonium sulfate (PDF) from Merck , accessed on January 19, 2011.
- PAETEC Formula Collection Edition 2003, p. 116.
- Malcolm Back, William D. Birch, Michel Blondieau and others: The New IMA List of Minerals - A Work in Progress - Updated: November 2018. (PDF 1753 kB) In: cnmnc.main.jp. IMA / CNMNC, Marco Pasero, November 2018, accessed on March 27, 2019 (English, Arcanite see p. 11).
- Process for the production of high-purity ammonium sulfate and calcite using gypsum