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Ammonium sulfide

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Ammonium sulfide Basic information
Ammonium sulfide Chemical Properties
  • Melting point:decomposes [HAW93]
  • Boiling point:40 °C
  • Density 1 g/mL at 25 °C
  • vapor pressure 600 hPa at 20 °C
  • refractive index n20/D 1.467
  • Flash point:90 °F
  • pka3.42±0.70(Predicted)
  • form Liquid
  • Specific Gravity1.2
  • color Yellow to orange
  • OdorAmmonia odour
  • PH Range9.5 ( 45% aqueous solution)
  • explosive limit4-46%
  • Water Solubility Miscible with water, alcohol and liquid ammonia.
  • Merck 13,560
  • Stability:Stable. Pure material is highly flammable - note wide explosion limits. Incompatible with strong oxidizing agents, strong acids, copper, brass, bronze, strong bases, zinc, aluminium.
  • CAS DataBase Reference12135-76-1(CAS DataBase Reference)
  • EPA Substance Registry SystemAmmonium sulfide (12135-76-1)
Safety Information
Ammonium sulfide Usage And Synthesis
  • Chemical Propertiesyellow to orange fuming liquid
  • Chemical PropertiesAmmonium sulfide is a yellow crystalline (sugar or sand-like) material, commonly found in liquid solution, which is flammable. Solution has an odor of rotten eggs.
  • Chemical PropertiesThe distinct ammonical/sulfurous odor of ammonium sulfide makes it a valuable flavor ingredient. It is used in baked goods, meat products, condiments and gravies.
  • Physical propertiesUnstable, decomposes at ambient temperature; forms yellow crystals below -18°C; hygroscopic; soluble in water and alcohol, very soluble in liquid ammonia.
  • UsesTo apply patina to bronze, in photographic developers, in textile manufacture, in trace metal analysis.
  • General DescriptionAmmonium sulfide aqueous solution is a colorless to yellow liquid, with an odor of rotten eggs or ammonia. Material in aqueous from the hydrosulfide which with acid forms H2S. Ammonium sulfide may be irritating to skin, eyes and mucous membranes and may cause illness from skin absorption. Ammonium sulfide may burn and/or emit toxic fumes if heated to high temperatures.
  • Air & Water ReactionsReadily oxidized to be pyrophoric in air [Bretherick 1979 p. 120]. Ammonium sulfide is slowly decomposed by moisture giving off hydrogen sulfide, a flammable gas. Heat is generated when the pure compound is first dissolved in water.
  • Reactivity ProfileAMMONIUM SULFIDE SOLUTION is a strongly alkaline aqueous solution. Reacts with acids to generate toxic gaseous hydrogen sulfide. Reacts with bases to release gaseous ammonia. May react vigorously with oxidizing agents, including inorganic oxoacids, organic peroxides and epoxides. Special Hazards of Combustion Products: Toxic hydrogen sulfide gas is released when solution is heated. If ignited, this will form irritating sulfur dioxide gas [USCG, 1999].
  • Health HazardInhalation of 500 ppm for 30 min. produces headaches, dizziness, bronchial pneumonia; 600 ppm for 30 min. can cause death. Ingestion causes severe irritation of mucous membranes and stomach. Contact with liquid causes severe burns of eyes and severe skin irritation. May be absorbed through skin and cause hydrogen sulfide poisoning.
  • Fire HazardSpecial Hazards of Combustion Products: Toxic hydrogen sulfide gas is released when solution is heated. If ignited, this will form irritating sulfur dioxide gas.
  • Industrial usesAmmonium sulfide (NH4)2S is a liquid with an obnoxious odor and because of this, it is not normally used in mineral processing. However, this is the most effective depressant for bornite and covellite. Essentially, (NH4)2S dissolves excess sulfur from the mineral surface, that allows other depressants to adsorb onto the mineral surface. In copper–lead separation, from a bulk concentrate containing covellite and bornite, (NH4)2S can effectively be used together with cyanide.
  • Potential ExposureIt is used in photographic developers, synthetic flavors, coloring metals (i.e., to apply patina to bronze); and to make textiles.
  • ShippingUN2923 Corrosive solids, toxic, n.o.s., Hazard class: 8; Labels: 8-Corrosive material, 6.1-Poisonous material, Technical Name Required. UN2683 Ammonium sulfide solution, Hazard class: 8; Labels: 8-Corrosive material, 6.1-Poisonous materials, 3-Flammable liquid
  • IncompatibilitiesVapor form explosive mixture with air Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Evolves poisonous ammonia on contact with strong bases. Contact with acid or acid fumes releases hydrogen sulfide. Keep away from moisture.
  • Waste DisposalAdd to a large volume of ferric chloride solution with stirring. Neutralize with soda ash. Flush to drain with water.
Ammonium sulfide Preparation Products And Raw materials
Ammonium sulfide(12135-76-1)Related Product Information
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