Cobalt Oxide, Cobalt Monoxide, Cobaltous Oxide, Cobalt Black, Black Pigment, Blue Pigment, 1307-96-6, 11104-61-3

Cobalt Oxide, Cobalt Monoxide, Cobaltous Oxide, Cobalt Black, Black Pigment, Blue Pigment, 1307-96-6, 11104-61-3

🧪 Cobalt(II) Oxide (CoO)

Cobalt(II) oxide (CAS 1307-96-6) is a powerful pigment and an important industrial compound. It is widely used in ceramics, paints, glass, catalysts, lithium-ion batteries, sensors, and superalloys. Its strong coloring ability and electrochemical properties make it a versatile material in modern industry.

1️⃣ Chemical Identity

• Molecular Formula: CoO

• Molecular Weight: 74.933 g/mol

• Chemical Name: Cobalt(II) Oxide

• CAS Number: 1307-96-6

• Other Names:

  • Co(II) Oxide

  • Cobalt Monoxide

  • Cobalt Black

  • Black Pigment

  • Blue Pigment

  • Cobaltous Oxide

2️⃣ Production

• Produced by calcination of cobalt carbonate under neutral or reducing atmospheric conditions:

CoCO3  →  CoO+CO2CoCO₃ \; \rightarrow \; CoO + CO₂

• Carbon dioxide is released during the process.

3️⃣ Physical & Chemical Properties

• Appearance: Greenish-brown powder; commercial grade is dark gray.

• Density: ~6.45 g/cm³

• Melting Point: ~1785 °C

• Solubility: Insoluble in water; highly soluble in ceramic glazes.

• Stability: Stable but hygroscopic (absorbs moisture).

• Color Variation: Particle size influences appearance (green to black).

4️⃣ Applications

• Ceramics: Pigment in glazes, modified with ZnO, SiO₂, and Al₂O₃.

• Paints: Strong pigment for coatings.

• Glass: Used for coloring and fiber production.

• Drying Agent: In varnishes and oils.

• Catalysis: Precursor for cobalt compounds; catalyst in oxidation reactions.

• Batteries:

  • Critical in lithium-ion batteries due to electro-optical, electrical, and magnetic properties.

  • Prevents lithium deposition on substrates during charge/discharge cycles.

• Sensors:

  • Gas sensors, temperature sensors, and dielectric materials.

• Advanced Materials:

  • Used in multi-oxide analytical chips with Zn, Mn, Ni oxides for VOC detection.

  • Component in high-strength magnetic superalloys.

5️⃣ Safety & Handling

• Hazards: Toxic if inhaled or ingested; may cause irritation.

• Precautions: Use gloves, goggles, and respirators.

• Storage: Keep in sealed, dry containers; avoid moisture.

📌 Summary: Cobalt(II) Oxide (CoO, CAS 1307-96-6) is a strong pigment and multifunctional industrial compound used in ceramics, paints, glass, catalysts, lithium-ion batteries, sensors, and superalloys, with high stability and excellent electrochemical performance.

Cobalt oxide

CAS: 1307-96-6;11104-61-3

Molecular Formula: CoO

Names and Identifiers

Physico-chemical Properties

1Risk and Safety

Hazard Symbols	Xn - Harmful N - Dangerous for the environment
Risk Codes	R22 - Harmful if swallowed R43 - May cause sensitization by skin contact R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Description	S24 - Avoid contact with skin. S37 - Wear suitable gloves. S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets.
UN IDs	UN 3288

Upstream Downstream Industry

Nature

black-gray powder. The relative density of 5.7 ~ 6.7I melting point (1795±20)℃. Soluble in acid, insoluble in water, alcohol, ammonia.

Preparation Method

Cobalt oxalate was prepared by a precipitation reaction between a cobalt nitrate solution and an ammonium oxalate solution. After filtration and washing, cobalt oxide was prepared by roasting an oxalic acid drill.

Use

used in semiconductor industry, electronic ceramics and other fields, can be used as varistor, thermistor, Lightning arrester and picture tube glass shell.

Safety

rat oral LDso:1.70g/kg. Inhalation of cobalt oxide dust can cause acute poisoning, the emergence of bronchial asthma. The maximum allowable concentration in air is 0.5 mg/m3. Staff should be protected. Do not contact with acids. When loading and unloading should be light to prevent packaging damage. When there is a fire, it can be suppressed by water, sand and various kinds of fire extinguisher.

Reference Information