Ammonium Sulphide

Let’s know about Ammonium Sulphide. Ammonium hydrosulfide (Ammonium Sulphide) is a chemical compound with the formula [NH 4 ]SH .


It is a salt derived from ammonium cation and hydrosulfide anion. Salt exists as colorless, water-soluble, microscopic crystals. On Earth the compound is found primarily as a solution, not as a solid, but

NH4 ]SH ice is thought to be an important component of the cloud decks of the gas-giant planets Jupiter and Saturn, by its photolysis. With the sulfur produced is responsible for the color of some of those planetary clouds. It can be produced by mixing hydrogen sulfide and ammonia.

chemical formula [NH 4 ]SH
molar mass 51.111 g/mol
appearance Yellow-orange fuming liquid (in solution). White rhombic crystal (anhydrous).
density 1.17 g/cm3 [ 1 ] [2]
boiling point 56.6 °C (133.9 °F; 329.8 K)
Solubility in water miscible
solubility Soluble in alcohol , liquid ammonia , liquid hydrogen sulfide ; insoluble in benzene , hexane and ether
refractive index ( nd ) 1.74


Ammonium hydrosulfide solution can be prepared by passing hydrogen sulfide gas through a concentrated ammonia solution. [4] According to a detailed 1895 report, hydrogen sulfide reacts with concentrated aqueous ammonia solution at room temperature to give [NH 4 ] 2 S 2 [ NH 4 ] SH . When this species is cooled to 0 °C and treated with additional hydrogen sulfide, one obtains [ NH 4 ] 2S 12 [NH 4 ] SH . [5]An ice-cold solution of this substance is kept at 0 °C and the continuous passage of hydrogen sulfide gives hydrosulfide.

Common “stink bombs” contain an aqueous solution of ammonium sulfide. The mixture readily converts into ammonia and hydrogen sulfide gases. This conversion shows the ease of the following equilibrium:

[NH 4 ] SH NH 3 + H 2 S

Ammonia and hydrogen sulfide each have a powerful and unpleasant odor.

“Ammonium Sulfide”

Aqueous solutions of ammonium sulfide (CAS registry number 12135-76-1), also known as diammonium sulfide , are commercially available, although the composition of these solutions is uncertain as they may contain a mixture of ammonia and [NH4 ]SH . Is . Ammonium sulfide solutions are sometimes used in photographic development, patina on bronze, and in textile manufacturing. It can be used as a selective reducing agent (cf. 2,4-dinitrochlorobenzene); Where there are two nitro groups, only one of them is selectively reduced.

The 1990–1991 CRC Handbook of Chemistry and Physics gives separate information for anhydrous ammonium monosulfide ( [ NH 4 ] 2S ) and ammonium pentasulfide ( [ NH 4 ] 2 S 5 ) from anhydrous ammonium hydrosulfide ( [ NH 4 ] SH ). Describing the first two as yellow crystalline substances that are soluble in cold water and alcohol, and which both decompose in hot water or normally at high temperatures (115 °C for pentasulfide), but the latter one White crystalline solid (which also decomposes in hot water). Thus, it seems that solid ammonium sulfide may be different from solid ammonium hydrosulfide, even though it is not true in aqueous solution.