Ammonium sulfate (IUPAC-recommended spelling; also ammonium sulphate in British English), (NH4)2SO4, is an inorganic salt with a number of commercial uses. The most common use is as a soil fertilizer. It contains 21% nitrogen as ammonium cations, and 24% sulfur as sulfate anions.

Fixing Agent for Acid Dyes
Fertiliser for Alkaline Soils
Adjuvant for Liquid fertilisers, Insecticides, Fungicides
Laboratory reagent for Purifying proteins
Preparation of Ammonium Salts
Wood preservative

Minimum Assay: >99%
Molecular Formula: H8N2O4S
Molecular Weight: 132.14g/mol
Melting Point: 280°
pH (5% soln 20°C): 4.5 – 6.0 5.48
Chloride (Cl): <.0.002%
Nitrate (NO3): <.0.002%
Heavy metals (as Pb): <.0.001%
Iron (Fe): <.0.001%
Arsenic (As): <.0.0005%
Loss on drying at 105oC: <.1.0%
Residue on ignition (as SO4): <.0.05%

Hazard Phrases: Not considered harmful under normal laboratory conditions

Cas No: 7783-20-2
Einecs No: 231-984-1