Copper (II) Oxide ( Cupric Oxide ) CuO Black Copper Oxide [ CAS: 1317-38-0 ] 36um Powder Pure - 50g

Copper(II) Oxide >99%
Other Names: Cupric oxide
Chemical Formula: CuO
Molar Mass: 79.55 g/mol
CAS Number: 1317-38-0
Appearance: Black or brownish-black crystalline powder or solid

Copper(II) oxide is an inorganic compound composed of copper and oxygen atoms. It occurs naturally as the mineral tenorite and is widely used in chemical synthesis, materials processing, electronics, and research. It is a stable, insoluble oxide that exhibits semiconducting properties and plays an important role in both industrial and laboratory applications.

Particle Size Distribution (approximate):

• D(0.1) ≤ 8 µm

• D(0.5) ≤ 19 µm

• D(0.9) ≤ 36 µm

• Particles >63 µm: Not detectable

Chemical and Physical Properties

• Density: 6.31 g/cm³

• Melting Point: 1,326 °C

• Boiling Point: Decomposes before boiling

• Solubility in Water: Insoluble

• Solubility in Other Solvents: Soluble in ammonium hydroxide, acids, and concentrated alkali solutions

• Electrical Properties: Semiconductor

Applications

Catalysis:

• Used as a catalyst in oxidation reactions and organic synthesis

Glass and Ceramics:

• Employed as a colorant in glass, enamels, and glazes for blue and green shades

• Contributes to blue coloration in flame tests

Electronics and Batteries:

• Utilized in the manufacture of semiconductors, sensors, and electrodes

Metallurgy:

• Involved in copper refining and electroplating processes

• Added to welding fluxes to prevent oxidation during metal joining

Laboratory Use:

• Precursor for copper compounds

• Demonstrations of decomposition, redox, and thermal reactions

Environmental Applications:

• Used in water treatment systems for heavy metal precipitation and contaminant removal

Safety

Signal Word: Warning

Hazard Statements:

• H400: Very toxic to aquatic life

• H412: Harmful to aquatic life with long-lasting effects

Precautionary Statements:

• P273: Avoid release to the environment

Supplemental Hazard Information:

• None

First Aid Measures

Eye Contact: Rinse cautiously with water for several minutes. Seek medical advice if irritation persists.
Skin Contact: Wash thoroughly with soap and water. Remove contaminated clothing.
Inhalation: Move to fresh air. Seek medical help if respiratory symptoms occur.
Ingestion: Rinse mouth. Do not induce vomiting. Seek medical attention.

Handling and Storage

Storage Conditions: Store in a tightly sealed container in a dry, well-ventilated area. Avoid contact with strong acids and oxidizers.
Handling Precautions: Avoid dust formation. Use appropriate personal protective equipment. Ensure local exhaust ventilation in confined areas.

Environmental Considerations

While copper(II) oxide is chemically stable, its release into aquatic environments should be prevented due to its toxicity to aquatic organisms. Waste and residues must be disposed of in accordance with local environmental regulations.