Copper(2+) sulfide
Copper(II) sulfide
CAS: 1317-40-4
Molecular Formula: CuS
Copper(2+) sulfide - Names and Identifiers
| Name | Copper(II) sulfide |
| Synonyms | CuS C.I. 77450 Copper Blue thioxocopper Coppersulfide Cupric sulfide copper sulphide Copper(2+) sulfide Copper(II) sulfide Copper monosulfide Copper (II) sulfide Horace Vernet's Blue C.I. Pigment Blue 34 Copper sulfide (CuS) Coppersulfidemeshblackpowder |
| CAS | 1317-40-4 |
| EINECS | 215-271-2 |
| InChI | InChI=1/C16H10N2O2.Cu/c19-15-9-5-1-3-7-11(9)17-13(15)14-16(20)10-6-2-4-8-12(10)18-14;/h1-8,17-18H;/q;+2/b14-13+ |
Copper(2+) sulfide - Physico-chemical Properties
| Molecular Formula | CuS |
| Molar Mass | 95.61 |
| Density | 4.6 g/mL at 25 °C (lit.) |
| Melting Point | 220 °C (dec.) (lit.) |
| Water Solubility | Soluble in nitric acid, ammonium hydroxide, potassium cyanide. Insoluble in water, ethanol, hydrochloric acid ,dilute acids, sulfuric acid, alkali cyanides, aqueous ammonia and alkaline solutions. |
| Appearance | Black powder |
| Specific Gravity | 4.6 (20℃) |
| Color | Black |
| Exposure Limit | ACGIH: TWA 1 mg/m3NIOSH: IDLH 100 mg/m3; TWA 1 mg/m3 |
| Solubility Product Constant(Ksp) | pKsp: 35.2 |
| Merck | 14,2965 |
| Storage Condition | Room Temprature |
| Stability | Stable, but may be moisture senstive. Incompatible with strong acids, strong oxidizing agents. |
| Sensitive | Air & Moisture Sensitive |
| Refractive Index | 1.45 |
| MDL | MFCD00016066 |
| Physical and Chemical Properties | Indigo blue, black monoclinic or hexagonal system, with metallic luster, chemical formula CuS, copper sulfide exists in nature in the form of Indigo copper ore. From the relative density of 4.6, stable in dry air, in wet air is gradually oxidized to copper sulfate, heat to 220 deg C decomposition. Almost insoluble in water or ethanol, solubility product is very small (8.0 × 10-37), soluble in hot dilute nitric acid, hot concentrated hydrochloric acid or concentrated sulfuric acid, the formation of the corresponding acid divalent copper salt; soluble in hot potassium cyanide KCN or sodium cyanide CaCN solution, the formation of four cyanide copper (I) complex [Cu(CN)4] 3-(four cyanide copper (II) potassium). In the production and analytical chemistry, the metal ions in the insoluble separation solution of copper sulfide can be used, for example, in the mixed solution of ni2-cu2, Zn2 -Cu2, the solution is first adjusted to slightly acidic, then the hydrogen sulfide gas is introduced, and the black CuS precipitate is generated, and the Cu2 in the solution is removed to achieve the purpose of separation. In the laboratory, hydrogen sulfide is introduced into the slightly acidic copper sulfate solution or ammonium sulfide is added to the copper sulfate solution, and the precipitated precipitate is filtered, washed and dried to obtain the finished copper sulfide product. Commonly used in the extraction of copper, the preparation of copper compounds and used in the preparation of mixed catalysts, aniline black dye developer and ship bottom protective coatings. |
| Use | Used as an analytical reagent |
Copper(2+) sulfide - Risk and Safety
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | GL8912000 |
| TSCA | Yes |
Copper(2+) sulfide - Upstream Downstream Industry
| Downstream Products | Copper(II) sulfate |
Copper(2+) sulfide - Introduction
Soluble in nitric acid, hot concentrated hydrochloric acid, sulfuric acid and sodium cyanide solution, slightly soluble in ammonium sulfide solution, insoluble in water and sodium sulfide solution. It can be oxidized into colloidal state in humid air. The conductivity is better than cuprous sulfide. Heat to 220 ℃ to decompose into cuprous sulfide.
Last Update：2022-10-16 17:13:21
Copper(2+) sulfide - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| copper sulfide concentrate smelting copper | dry and fine copper sulfide concentrate is smelted into copper matte or crude copper in suspension under the action of high-speed hot air flow or oxygen-enriched air flow. It integrates roasting, smelting and partial blowing processes in one equipment, and is a rapidly developing copper smelting method to strengthen production, reduce energy consumption and eliminate pollution. Since the end of the 19th century, metallurgists have proposed the idea of smelting fine-grained copper sulfide concentrate in a suspended state. After the Second World War, Finland's Outokumpu Oy added a shaft furnace to the top of the reverberatory furnace for flash copper smelting test, and the charge was added to the shaft furnace to move vertically from top to bottom. After the successful test, a flash furnace for daily treatment of 300t copper sulfide concentrate was built in Haria Valta (Harjavalta) smelter in 1949. Canada International Nickel Company (Inco Ltd) also began a flash copper smelting test in 1945, and the charge was sprayed horizontally into the horizontal furnace with the aid of an oxygen stream. After the successful test, a flash furnace for processing 500t copper sulfide concentrate per day was built in the Copper cliff smelter in 1952 and put into production. By 1989, there were about 34 copper flash furnaces in the world, four of which adopted the technology of International Nickel Company, and the rest adopted Outokumpu technology, which has accounted for the 1/3 of the world's primary copper production capacity and has become one of the most important copper smelting methods for sulfide mines. |
| solubility in water (g/100ml) | dissolved grams per 100ml of water: 2.4 × 10-17/20 ℃ |
| Use | Used as analytical reagent Preparation of mixed catalyst, aniline black dye color development, bottom protection paint. Used for coloring carbon paper and ordinary ballpoint pen oil |
| production method | 1. a double-tube electric furnace is adopted. sulfur is placed at one end and copper foil coil is placed at one end in a quartz tube. after the system is vacuumed, one end of sulfur is heated to 425 ℃, one end of copper is heated to 450 ℃, and after continuous heating for 24 hours, CuS is obtained by slowly cooling. 2. Hydrogen sulfide is introduced into copper sulfate solution, or Na2S or (NH4)2S is added to Cu2 solution, and the precipitate generated is filtered and dried to obtain CuS products. |
| category | toxic substances |
| flammability hazard characteristics | non-combustible; toxic copper and sulfur oxide smoke from the fire site |
| storage and transportation characteristics | warehouse low temperature, ventilation, drying |
| fire extinguishing agent | water, carbon dioxide, dry powder, sand |
| occupational standard | TWA 0.1 mg (copper)/m3; STEL 0.2 mg (copper)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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