Ammonium Sulfide Formula, Preparation Method, Chemical Properties


Ammonium Sulfide: Formula, Preparation Method, and Chemical Properties

Ammonium sulfide, also known as ammonium hydrosulfide, is a colorless gas with a pungent odor. It is a compound of ammonia and hydrogen sulfide, and is commonly used in the production of fertilizers, dyes, and pharmaceuticals.

Structural Formula

This is the structural formula of the ammonium sulfide:

Ammonium Sulfide Formula

Chemical Formula

The chemical formula of the ammonium sulfide is (NH4)2S.

Preparation Method

Ammonium sulfide can be prepared through the reaction of ammonia and hydrogen sulfide gases. The reaction occurs at elevated temperatures and results in the formation of a gas mixture, which can be condensed to form a liquid.

HS + exc NH→ (NH4)2S

Physical Properties

Molecular weight 68.154g/mol
Density 0.997g/cm3
Melting point Decomposes at ambient temperatures
Solubility in water 128.1g/100mL
Appearance Yellow crystals hygroscopic
Solubility Solubility in alcohol

Chemical Properties

Ammonium sulfide is a weak acid, and its behavior in aqueous solutions is similar to that of other weak acids. It readily dissociates into ammonia and hydrogen sulfide ions in water, and the pH of the solution is affected by the relative concentrations of these ions.

In addition to its acidic properties, ammonium sulfide is also a reducing agent. It is capable of reducing metal ions in aqueous solutions, and is commonly used for this purpose in analytical chemistry.

(NH4)2S → HS+NH3


  • Fertilizers: Ammonium sulfide is used as a source of sulfur in the production of fertilizers, which are essential for plant growth and the maintenance of healthy soil.
  • Dyes: It is used as an intermediate in the production of certain dyes, including those used in textiles and paper manufacturing.
  • Pharmaceuticals: Ammonium sulfide is used in the production of some pharmaceuticals, including those used to treat respiratory and digestive disorders.


Ammonium sulfide is a toxic gas, and exposure to high concentrations can result in respiratory irritation and other health effects. It is important to handle and store ammonium sulfide appropriately, and to follow proper safety procedures when working with this substance.


In conclusion, ammonium sulfide is a versatile compound with a range of applications in the production of fertilizers, dyes, and pharmaceuticals. Its behavior in aqueous solutions, as well as its reducing properties, make it a valuable tool in analytical chemistry. However, it is also a toxic gas, and care must be taken to handle and store it safely.

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