Potassium sulfide
- Dikaliummonosulfid
- Dipotassium
- Potassium monosulfide
- Potassium sulfuratum
A12BA
Hygroscopic, colorless to yellowish or brownish red odor of hydrogen sulfide solids
Fixed
1.81 g · cm -3 ( 14 ° C)
840 ° C.
Readily soluble in water with decomposition
Risk
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Potassium sulphide is a potassium salt of the hydrogen sulfide (H2S).
Properties
In contact with air may cause the spontaneous self-ignition. Potassium sulfide is hygroscopic, the hydrates formed are not flammable. Contact with acids leads to the release of toxic hydrogen sulphide. In the presence of oxidizing agents, releasing sulfur dioxide. Vibration or friction can cause an explosion. To potassium sulfide converts to the air gradually to in potassium.
Aqueous solutions of potassium sulfide are strongly basic and react violently with acids.
Representation
One possible method of presentation is the saturation of a potassium hydroxide solution with hydrogen sulfide. In the solution, potassium hydrogen sulfide forms that can be implemented potassium hydroxide solution to potassium sulphide with an equivalent amount.
From the solution, the salt crystallizes with 5 mol crystal water. The gross drainage is accompanied by a partial decomposition. The specified with sodium sulfide method is successful.
In principle, potassium sulfide can also win by melting together sulfur and potassium carbonate. The brown mixture product (sulfur liver) is indeed available commercially as potassium sulfide, contains in addition to this, but in addition Kaliumpolysulfide, potassium thiosulfate, and potassium sulfate.
Toxicology
On the skin, eyes and respiratory tract potassium sulfide is corrosive. Depending on the exposure occurs externally to redness, blistering, and combustion phenomena. Ingestion has nausea, vomiting, diarrhea and colic result. Nausea and vomiting also occur in inhalation. In addition, a strong cough, sore throat, headache. In the worst case, pulmonary edema may form.