Ammonium sulfide

Ammonium sulfide
Names
	IUPAC name Ammonium sulfide
	Other names Diammonium sulfide
Identifiers
CAS Number	12135-76-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	23808 ;
ECHA InfoCard	100.032.009
PubChem CID	25519;
RTECS number	BS4900000;
UNII	2H0Q32TDFZ ;
UN number	2683 (solution)
CompTox Dashboard (EPA)	DTXSID60893218 ;
	InChI InChI=1S/2H3N.S/h21H3;/q;;-2/p+2 Key: UYJXRRSPUVSSMN-UHFFFAOYSA-P ; InChI=1/2H3N.S/h21H3;/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
Hazards
NFPA 704 (fire diamond)	3 3 0
Flash point	32.22 °C (90.00 °F; 305.37 K)
Safety data sheet (SDS)	External MSDS
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). verify (what is ?) 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,^[2] 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.^[3]

References

^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
^ Meyer B, Ward K, Koshlap K, Peter L "Second dissociation constant of hydrogen sulfide" Inorganic Chemistry', (1983). volume 22, pp. 2345.doi:10.1021/ic00158a027
^ J. T. Baker: MSDS for Ammonium Sulfide

[1] Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8

[2] Meyer B, Ward K, Koshlap K, Peter L "Second dissociation constant of hydrogen sulfide" Inorganic Chemistry', (1983). volume 22, pp. 2345.doi:10.1021/ic00158a027

[3] J. T. Baker: MSDS for Ammonium Sulfide

[1]

[2]

[3]