Ammonium sulfide

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Yellow crystals that are unstable at room temperature or in the presence of moisture. Ammonium sulfide is sold commercially as a liquid that is primarily composed of ammonium bisulfide, NH4HS. Ammonium sulfide is used in photographic developers, in the manufacture of textiles, and to produce a dark patina on brasses and bronzes.

Synonyms and Related Terms

diammonium sulfide; aqueous ammonium sulfide

Other Properties

Soluble in water. pH = 9.5

Smells of ammonia and rotten eggs.

Composition (NH4)2S
CAS 12135-76-1
Molecular Weight mol. wt. = 68.15

Hazards and Safety

Evolves hydrogen sulfide on contact with acids. Strongly irritating to skin and membranes. Flammable. Flash point = 22 C

Mallinckrodt Baker: MSDS 11/02/01


  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 591

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