Silver sulfide
Silver(I)Sulfide
CAS: 21548-73-2
Molecular Formula: Ag2S
Silver sulfide - Names and Identifiers
| Name | Silver(I)Sulfide |
| Synonyms | SILVER SULFIDE Silver sulfide SILVER SULPHIDE Silver(I)Sulfide SILVER(I) SULFIDE disilver sulphide Silver(I) Sulphide argentiosulfanylsilver |
| CAS | 21548-73-2 |
| EINECS | 244-438-2 |
| InChI | InChI=1/2Ag.S/rAg2S/c1-3-2 |
Silver sulfide - Physico-chemical Properties
| Molecular Formula | Ag2S |
| Molar Mass | 247.8 |
| Density | 7.234 g/mL at 25 °C (lit.) |
| Melting Point | 845 °C (lit.) |
| Boling Point | decomposes [HAW93] |
| Water Solubility | Soluble in HNO{3}, alkali cyanide solutions. Insoluble in water |
| Solubility | Soluble in aq. HCN, aq. citric acid with KNO3. Insoluble in acids, alkalies, aqueous ammoniums. |
| Appearance | Powder |
| Specific Gravity | 7.317 |
| Color | Light yellow |
| Solubility Product Constant(Ksp) | pKsp: 49.20 |
| Merck | 14,8530 |
| Stability | Stable. Incompatible with acids, strong oxidizing agents. |
| Sensitive | Light Sensitive |
| Physical and Chemical Properties | Melting Point: 845 density: 7.23 |
| Use | Used as an analytical reagent |
Silver sulfide - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 8 |
| TSCA | Yes |
| HS Code | 28432900 |
| Hazard Class | 9 |
Silver sulfide - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| overview | silver sulfide has two crystal forms. Alpha-type: black cubic crystal or powder, naturally silver ore. Relative density 7.317. It is stable at high temperature, the melting point is 825 ℃, and it decomposes when it is hotter. Almost insoluble in water, soluble in potassium cyanide solution, insoluble in dilute sulfuric acid, ammonia, acid sodium sulfate solution. Red crystal disulfide is formed in concentrated potassium sulfide and sodium sulfide solution. β-type: gray-black orthorhombic crystal or powder, naturally spiro-like silver sulfide ore, with 7.326 relative density, insoluble in water, soluble in potassium cyanide solution, concentrated sulfuric acid, nitric acid, and when dissolved in nitric acid, silver nitrate and sulfur are generated, Transformed into α-type at 175 ℃. |
| Use | Used as analytical reagent Determination of sulfur, oxygen, bromine, and iodine ions in the soil. Alloy. Making pottery. |
| production method | 1. under the condition of 90~100 ℃, silver oxide (I) is reacted with sulfur to generate silver sulfide (I). when there is water vapor, Ag2SO4 can also be converted into silver sulfide (I) by excess sulfur. 2. Reaction of sodium thiosulfate with silver oxide (Ⅰ), silver nitrate and other soluble silver salts to obtain silver sulfide (Ⅰ) 3. Reaction of soluble silver salt with soluble sulfide to obtain silver sulfide (Ⅰ) |
Last Update：2024-04-10 22:29:15
