| Name | AMMONIUM POLYSULFIDE |
| Synonyms | ammoniumtrisulfide AMMONIUM POLYSULFIDE ammoniumsulfide((nh4)2(s3)) Tetraamminepalladium(II)nitrite |
| CAS | 12259-92-6 |
| EINECS | 235-512-5 |
| Molecular Formula | H4NS3- |
| Molar Mass | 114.22 |
| Physical and Chemical Properties | EPA Chemical Information Ammonium sulfide ((NH4)2(S3)) (12259-92-6) |
| Downstream Products | 2-Phenylacetamide Ammonium thiosulfate |
Ammonium polysulfide
Chemical formula (NH4)2Sx. Ammonium polysulfide exists only in solution. Yellow, turning red with the increase of x value, with the smell of ammonia and hydrogen sulfide. Unstable, long-term exposure to the air to decompose and precipitate sulfur. Sulfur is precipitated in case of acid and toxic hydrogen sulfide gas is released. Hydrogen sulfide is injected into 28% ammonia water to obtain ammonium sulfide solution, and then dissolved into excess sulfur. Used as insecticide and analytical reagent.
Chemical formula (NH4)2S5 of ammonium pentasulfide. Molecular weight 196.40. Yellow to orange-yellow prismatic crystals. Melting point 115 ℃ (decomposition). It is easy to decompose into NH3, H2S and S. Easily soluble in water, dissolved in water and immediately decomposed to precipitate sulfur, soluble in ethanol, insoluble in ether, carbon disulfide, soluble in ammonia. It melts at 95°C in a closed tube and becomes a red liquid. Unstable in acidic solution, H2S is released by acid decomposition, and sulfur and ammonium salt are precipitated. Preparation method: It is prepared by reacting ammonia with hydrogen sulfide and sulfur, and dissolving elemental sulfur in ammonium sulfide solution. Purpose: Used as a reagent commonly used in analytical chemistry.
category
Corrosive articles
Toxicity classification
Highly toxic
Acute toxicity
oral-rat LD50: 152 mg/kg; Skin-rabbit LD50: 1790 mg/kg
flammability hazard characteristics
Combustible; combustion decomposes toxic nitrogen oxides, sulfur oxides and ammonia smoke; decomposes toxic ammonia and hydrogen sulfide at room temperature; releases toxic hydrogen sulfide gas in case of acid
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored separately from acid
Fire extinguishing agent
Water