1312-73-8
dipotassium sulphide
CAS: 1312-73-8;37248-34-3
Molecular Formula: K2S
1312-73-8 - Names and Identifiers
1312-73-8 - Physico-chemical Properties
| Molecular Formula | K2S |
| Molar Mass | 110.26 |
| Density | 1.74 |
| Melting Point | 912° |
| Boling Point | 912 °C |
| Water Solubility | very soluble H2O, alcohol, glycerol; insoluble ether [MER06] |
| Vapor Presure | 12600mmHg at 25°C |
| Appearance | Powder |
| Color | white to yellow |
| Stability | Stable, but air-sensitive. Flammable. Contact with acids liberates poisonous hydrogen sulfide. Anhydrous material may be spontaneously combustible. |
| Sensitive | air sensitive, hygroscopic |
| Physical and Chemical Properties | Potassium sulfide, chemical formula K2S. Molecular weight 110.26. White cubic crystals or frit. Easy to absorb moisture. The air is prone to red or yellow-red. Specific gravity 1.805(14 °c). Melting point 840 °c. Very soluble in water, soluble in ethanol, glycerol, insoluble in ether. The aqueous solution is strongly alkaline. Unstable, rapid heating may be explosive. Prepared by heating potassium sulfate with carbon in a sealed crucible. Used as a pharmaceutical and analytical reagent. |
| Use | Used as an analytical reagent, also in the pharmaceutical industry. Used as an analytical reagent, depilatory agent, and insecticide, also in the pharmaceutical industry. |
1312-73-8 - Risk and Safety
| Risk Codes | R31 - Contact with acids liberates toxic gas R34 - Causes burns R50 - Very Toxic to aquatic organisms |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | 1382 |
| Hazard Class | 4.2 |
| Packing Group | II |
1312-73-8 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | at room temperature, potassium sulfide is a light yellow-brown cubic crystal, which is an inorganic compound, the relative density of 1.805(14 deg C), melting point of 840 deg C, unstable in the air, easy deliquescence, by impact or heating, explosion may occur, in the air can be gradually oxidized. Soluble in water, ethanol and glycerol, insoluble in ether, strong alkaline aqueous solution. When exposed to acid, hydrogen sulfide is released. Used as analytical reagents for dyes, paper, leather and other industries. The potassium hydroxide solution was saturated with an excess of hydrogen sulfide, and the same amount of potassium hydroxide was added. Industrially, potassium sulfate and carbon are heated at a high temperature to produce a finished potassium sulfide product. K2s-5h2o was crystallized from the aqueous solution. The aqueous solution thereof is strongly alkaline by hydrolysis. |
| pharmacological effects | copper is one of the essential trace elements in human body. Copper ions are involved in the synthesis of many important enzymes, such as cytochrome oxidase, superoxide dismutase, tyrosinase, dopamine β-hydroxylase, lysyl oxidase and ceruloplasmin. However, when the amount of copper in the body is too high, high concentrations of copper will cause cell damage and necrosis, leading to organ damage. Its cytotoxicity may be due to: it binds too much to proteins and nucleic acids; Or oxidizes the lipids of various membranes; Or it produces too many oxygen free radicals. Therefore, deficiency or excessive storage of copper can cause serious diseases. hepatolenticular degeneration, also known as Wilson's disease, is an autosomal recessive disorder of copper metabolism. When this mechanism is defective, the discharge of copper from the bile decreases sharply, however, due to the normal absorption of copper in the intestinal tract of the patient, a large amount of copper is stored in the liver cells, which eventually leads to abnormal liver function and cirrhosis. At the same time, the content of non-ceruloplasmin copper in blood increases, resulting in increased excretion from urine and a large number of deposits in brain, kidney, muscle and eye tissues, and the corresponding symptoms of various systems involved in clinic appear. Potassium sulfide can make copper in the intestine to form insoluble copper sulfide and exclude in vitro, inhibit the absorption of copper. |
| Use | It is used as an analytical reagent, depilatory agent and insecticide, and also in the pharmaceutical industry. |
| category | spontaneous combustion articles |
| toxicity grade | high toxicity |
| Acute toxicity | Reference range oral-rat LD50: 208 mg/kg |
| explosive hazard characteristics | The aqueous solution is alkaline and corrosive to skin and cornea; corrosion to metals |
| flammability hazard characteristics | flammable and toxic hydrogen sulfide gas in case of acid; combustion releases toxic hydrogen sulfide and sulfur dioxide gas |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from oxidants and acids. |
| fire extinguishing agent | water and sand |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:52:54
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