COPPER(II) SULFIDE CAS 1317-40-4
CAS number：1317-40-4
molecular formula：CuS
molecular weight：95.61
EINECS number：215-271-2
English synonyms
C.I. 77450;C.I. Pigment Blue 34;Copper Blue;Copper monosulfide;Copper sulfide (CuS);Copper(2+) sulfide;CuS;Horace Vernet's Blue
Related categories
Catalysis and Inorganic Chemistry; General Reagents; Copper; Biochemical Reagents - Other Chemical Reagents; Sulfide Powder - Copper Sulfide; Chemical Raw Materials; Sulfide; Metal chalcogenides; Chalcogenides; Materials Science; Inorganics; Metal and Ceramic Science; 1317-40- 4
Chemical properties
| Melting point | 220 °C (dec.) (lit.) |
| Density | 4.6 g/mL at 25 °C (lit.) |
| Refractive index | 1.45 |
| Shape | powder |
| Color | Black |
| Specific gravity | 4.6 (20℃) |
| 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. |
| Sensitive | Air & Moisture Sensitive |
Merck | 14,2965 |
| Ksp precipitation equilibrium constant | pKsp: 35.2 |
| Exposure Limits | ACGIH: TWA 1 mg/m3 |
| Stability | Stable, but may be moisture senstive. Incompatible with strong acids, strong oxidizing agents. |
| CAS database | 1317-40-4(CAS DataBase Reference) |
Use
● as analytical reagents
● Preparation of mixed catalyst, nigrosine dye color development, ship bottom protection paint.
● For the coloring of carbon paper and ordinary ballpoint pen oil
Production method
● Using a double-tube electric furnace, put sulfur at one end and copper foil at the other end in a quartz tube. After the system is evacuated, heat one end of sulfur to 425°C, and one end of copper to 450°C. After continuous heating for 24 hours, slowly Slowly cool it to get CuS.
● Pass hydrogen sulfide into the copper sulfate solution, or add Na2S or (NH4)2S to the Cu2+ solution, filter and dry the resulting precipitate to obtain the CuS product.
