Ammonium sulfide

Ammonium sulfide
Ammonium sulfide
CAS number 12135-76-1 YesY
PubChem 25519
ChemSpider 23808 YesY
UN number 2683 (solution)
RTECS number BS4900000
Jmol-3D images Image 1
Molecular formula (NH4)2S
Molar mass 68.154 g/mol
Appearance yellow crystals (> -18 °C) [1]
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
MSDS External MSDS
EU Index 016-008-00-2
EU classification Corrosive (C)
Dangerous for the environment (N)
R-phrases R31, R34, R50
S-phrases (S1/2), S26, S45, S61
NFPA 704
NFPA 704.svg
Flash point 32.22 °C
Related compounds
Other anions Ammonium hydroxide
Other cations Sodium sulfide
Potassium sulfide
Related compounds Ammonium hydrosulfide
 YesY sulfide (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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 pKa 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 is used 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.


Ammonium sulfide is prepared from reacting hydrogen sulfide with excess amounts of ammonia:

H2S + 2 NH3 → (NH4)2S


Solutions of "ammonium sulfide" are hazardous as labile sources of toxic hydrogen sulfide.[3]


  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

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Look at other dictionaries:

  • ammonium sulfide — amonio sulfidas statusas T sritis chemija formulė (NH₄)₂S atitikmenys: angl. ammonium sulfide rus. аммоний сернистый; аммония сульфид ryšiai: sinonimas – diamonio sulfidas …   Chemijos terminų aiškinamasis žodynas

  • ammonium sulfide — noun : a sulfide of ammonium: as a. : the unstable colorless to yellow crystalline normal sulfide (NH4)2S b. : the white crystalline hydrosulfide NH4HS used in aqueous solution chiefly in the textile industry …   Useful english dictionary

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  • sulfide — /sul fuyd, fid/, n. Chem. a compound of sulfur with a more electropositive element or, less often, a group. [1830 40; SULF(UR) + IDE] * * * ▪ inorganic Introduction also spelled  sulphide    any of three classes of chemical compounds containing… …   Universalium

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