Ammonium sulfide

Ammonium sulfide

Names
IUPAC name Ammonium sulfide
Other names Diammonium sulfide
Identifiers
CAS Number	12135-76-1 Y
ChemSpider	23808 Y
Jmol 3D model	Interactive image
PubChem	25519
RTECS number	BS4900000
UNII	2H0Q32TDFZ Y
UN number	2683 (solution)
InChI InChI=1S/2H3N.S/h2*1H3;/q;;-2/p+2 Y Key: UYJXRRSPUVSSMN-UHFFFAOYSA-P Y InChI=1/2H3N.S/h2*1H3;/q;;-2/p+2 Key: UYJXRRSPUVSSMN-SKRXCDHZAF
SMILES [S-2].[NH4+].[NH4+]
Properties
Chemical formula	(NH4)2S
Molar mass	68.154 g/mol
Appearance	yellow crystals (> −18 °C) hygroscopic
Density	0.997 g/cm3
Melting point	decomposes at ambient temperatures
Solubility in water	128.1 g/100 mL
Solubility	soluble in alcohol very soluble in liquid ammonia
Vapor pressure	{{{value}}}
Related compounds
Other anions	Ammonium hydroxide
Other cations	Sodium sulfide Potassium sulfide
Related compounds	Ammonium hydrosulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

Ammonium sulfide, also known as diammonium sulfide, is an unstable salt with the formula (NH₄)₂S. Aqueous solutions purporting to contain this salt are commercially available. With a pK_a exceeding 15, the hydrosulfide ion cannot be deprotonated to an appreciable amount by ammonia. Thus, such solutions mainly consist of a mixture of ammonia and (NH₄)SH. Ammonium sulfide solutions are used occasionally in photographic developing, to apply patina to bronze, and in textile manufacturing. Also, due to its offensive smell, it is the active ingredient in a variety of foul pranks including the common stink bomb.

It can be used as a selective reducing agent (cf Clonitazene), where there are 2 nitro groups only one of them is selectively reduced.

Safety

Solutions of "ammonium sulfide" are hazardous as labile sources of toxic hydrogen sulfide.