Ammonium sulfide Chemical Properties
- Melting point:
- decomposes [HAW93]
- Boiling point:
- 40 °C
- 1 g/mL at 25 °C
- vapor pressure
- 600 hPa at 20 °C
- refractive index
- 2053 | AMMONIUM SULFIDE
- Flash point:
- 90 °F
- Specific Gravity
- Yellow to orange
- Ammonia odour
- PH Range
- 9.5 ( 45% aqueous solution)
- explosive limit
- Water Solubility
- Miscible with water, alcohol and liquid ammonia.
- 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 Reference
- 12135-76-1(CAS DataBase Reference)
- EPA Substance Registry System
- Ammonium sulfide (12135-76-1)
Ammonium sulfide Usage And Synthesis
yellow to orange fuming liquid
Ammonium 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.
The distinct ammonical/sulfurous odor of ammonium sulfide makes it a valuable flavor ingredient. It is used in baked goods, meat products, condiments and gravies.
Unstable, decomposes at ambient temperature; forms yellow crystals below -18°C; hygroscopic; soluble in water and alcohol, very soluble in liquid ammonia.
To apply patina to bronze, in photographic developers, in textile manufacture, in trace metal analysis.
Ammonium 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 Reactions
Readily 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.
AMMONIUM 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].
Inhalation 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.
Special Hazards of Combustion Products: Toxic hydrogen sulfide gas is released when solution is heated. If ignited, this will form irritating sulfur dioxide gas.
Ammonium 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.
It is used in photographic developers, synthetic flavors, coloring metals (i.e., to apply patina to bronze); and to make textiles.
UN2923 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
Vapor 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.
Add 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 POLYSULFIDE
- Methylene dithiocyanate
- Acid Green 25
- ACID BLUE 41
- AURORA KA-6210
- REACTIVE BLACK 5
- Ammonium sulfide
- Ordinary vulcanizer
- Zinc sulfide
- Ammonium chloride
- Ammonium hydroxide
- Ammonium acetate
- Ammonium nitrate
- Ammonium sulphide solution
- Molybdic acid
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