Copper II Sulfide
Copper ii sulfide or cupric sulfide represented by the chemical formula CuS that bears the IUPAC name sulfanylidenecopper  is a black powder or lumps that is soluble in nitric acid but insoluble in water . It occurs as the mineral covellite and is an ionic compound [3, 4]. It is stable in air when it is dry but gets oxidized to copper sulfate by moisture in the air .
Copper II Sulfide Identification
|CAS Number||1317-40-4 |
|PubChem CID||14831 |
|ChemSpider ID||145403 |
|EC Number||215-271-2 |
Composition and Synthesis
Copper ii sulfide can be prepared by a reaction between molten sulfur and copper that is later followed by boiling in sodium hydroxide .
Cu + S = CuS
Properties and Characteristics of Copper 2 Sulfide
|Molar mass/molecular weight||95.606 g/mol |
|Color/appearance||Black powder |
|Melting point/freezing point||220°C, 428°F (decomposes) |
|Boiling point||N/A |
|Density||4.6 g ml-1 at 25°C |
|State of matter at room temperature (normal phase)||Solid |
|Refractive index||1.45 |
|Solubility in water||N/A |
|Crystal structure||Hexagonal |
Prominent Reactions of CuS
Copper ii sulfide reacts with oxygen at a temperature of 300-500°C to form copper oxide and sulfur dioxide .
2CuS + 3O2 = 2CuO + 2SO2
Cupric Sulfide Uses
- In the preparation of mixed catalysts .
- In developing aniline black dye for textile printing .
- In antifouling paints .
- In photo optic applications and as a semiconductor .
Is It Dangerous
Cupric sulfide is toxic if ingested. Contact with eyes and skin and inhalation should be avoided since it may cause irritation. It has a long lasting harmful effect on aquatic life [1, 3, 5]. Under fire conditions, it decomposes to produce hazardous copper oxides and sulfur oxides .
- Copper (II) Sulfide – Pubchem.ncbi.nlm.nih.gov
- Copper (II) Sulfide – Chemspider.com
- Copper (II) Sulfide – Chemicalbook.com
- Ionic bond examples – Examples.yourdictionary.com
- Copper Sulfide CuS – Espimetals.com
- Copper Sulfide – Americanelements.com
- Copper sulfide react with oxygen – Chemiday.com
- Material Safety Data Sheet – Chembk.com