Copper (ii) oxide
| Density | ~ 6.2 g/cm3 |
| HS Code | 28255000 |
| CAS number | 82010-82-0 |
| Storage | without limitations |
| SDS | available |
| RTECS | GL8200000 |
| R phrase | R 22 |
| S phrase | S 22 |
| Odour | odourless |
| Form | solid |
| Color | greyish – black |
| Solubility in water | insoluble (20°c) |
| Melting point | ~ 1300 °C |
| Assay | ≥ | 55 | % |
| Description | Conforms | ||
| Identification | Conforms | ||
| Solubility | Conforms | ||
| Chloride | ≤ | 0.005 | % |
| Total carbon | ≤ | 0.002 | % |
| Total nitrogen | ≤ | 0.002 | % |
| Total sulfur | ≤ | 0.005 | % |
Copper(II) Oxide is a black, inorganic compound composed of copper and oxygen, commonly used in chemical reactions, ceramics, and as a precursor to other copper compounds.
🏭⚗️ Production
Copper(II) oxide is produced through several methods, most commonly by heating copper in the presence of oxygen or air at high temperatures. It can also be formed by the thermal decomposition of copper(II) compounds such as copper(II) nitrate, copper(II) hydroxide, or copper(II) carbonate. The resulting black solid is collected and may be purified by washing and drying.
🔬 Properties
Copper(II) oxide is a black, crystalline solid with a formula of CuO. It has a monoclinic crystal structure and is insoluble in water but soluble in acids. It has a melting point of approximately 1,200 °C and a density of around 6.3 g/cm³. As a p-type semiconductor, copper(II) oxide has applications in electronics due to its narrow band gap. It readily undergoes redox reactions and can be reduced to metallic copper under suitable conditions.
🧪 Applications
Copper(II) oxide is widely used in the production of other copper salts and compounds. It serves as a pigment in ceramics and glass, giving them a blue, green, or black coloration depending on conditions. In organic chemistry, it acts as an oxidizing agent, and in metallurgy, it is used to produce metallic copper through reduction. It also finds use in batteries, as a catalyst, and in antifouling paints to prevent biofouling on ship hulls.
⚠️ Safety
Copper(II) oxide should be handled with care, as it can cause irritation to the skin, eyes, and respiratory tract. Inhalation of dust or prolonged exposure may lead to metal fume fever or copper poisoning, especially in industrial settings. Proper protective equipment such as gloves, goggles, and dust masks should be used during handling. The compound should be stored in a dry, well-ventilated area away from incompatible substances such as strong acids or reducing agents.
