Ammonium sulfate bottle and sample.
| IUPAC name
Ammonium tetraoxosulfate (VI)
| Other names
Sulfuric acid diammonium salt
|Molar mass||132.14 g/mol|
|Density||1.769 g/cm3 (at 20 °C)|
|Melting point||235 to 280 °C (455 to 536 °F; 508 to 553 K) (decomposes)|
| 70.6 g/100 ml (0 °C)|
74.4 g/100 ml (20 °C)
76.4 g/100 ml(25 °C)
103.8 g/100 ml (100 °C)
|Solubility||Insoluble in acetone, diethyl ether and ethanol|
|Vapor pressure||14 mm Hg (at 20 °C)|
|Safety data sheet||Fisher Scientific|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
|2840 mg/kg, rat (oral)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Ammonium sulfate (IUPAC name ammonium tetraoxosulfate (VI)) or ammonium sulphate, is an inorganic salt with the formula (NH4)2SO4, commonly used as a fertilizer and in biochemistry in the separation of proteins.
When ammonium sulfate is mixed with a soluble calcium salt, calcium sulfate precipitates.
- (NH4)2SO4 + CaCl2 → 2 NH4Cl + CaSO4
- (NH4)2SO4 + Ca(NO3)2 → 2 NH4NO3 + CaSO4
- (NH4)2SO4 + Ca(CH3COO)2 → 2 CH3COONH4 + CaSO4
Ammonium sulfate is a white solid, soluble in water and insoluble in organic solvents. It is odorless and has a saline taste. Its density is 1.769 g/cm3 at 20 °C.
Ammonium sulfate is sometimes available as a fertilizer, either pure or mixed with other additives.
Some chimney cleaning powders contain a mixture of ammonium sulfate, ammonium chloride and other additives. Ammonium sulfate can be extracted from the mixture via recrystallization from water.
Lastly it can be bought from chemical suppliers and online.
- H2SO4 + 2 NH3(aq) → (NH4)2SO4(aq)
- H2SO4 + 2 NH4HCO3 → (NH4)2SO4 + 2 H2O + 2 CO2
- H2SO4 + (NH4)2CO3 → (NH4)2SO4 + H2O + CO2
- Salt out proteins
- Make Mohr's salt (ammonium iron(II) sulfate)
- Make ammonium nitrate
Ammonium sulfate poses little toxicity and no special protective equipment is required when handling it.
Should be kept closed bottles or bags.
No special disposal is required. Discard it as you wish.