Cobalt(II) oxide
Cobalt(II) oxide (CAS: 1307-96-6, CoO, MW: 74.93) is a chemical compound of cobalt and oxygen. It typically appears as a grey to black powder. This inorganic oxide finds application in the production of coloured glass and ceramics, and as a precursor in various chemical syntheses, particularly in areas related to magnetic materials and catalysis. Tech Serve Solutions supplies Cobalt(II) oxide for research and industrial purposes.
- IUPAC
- Cobaltous oxide

Pigments for Glass and Ceramics
Cobalt(II) oxide is widely used as a pigment to impart blue colours to glass, enamels, and ceramic glazes. Its stable colouration at high firing temperatures makes it ideal for decorative and functional applications.
Precursor for Magnetic Materials
This oxide serves as a key precursor in the synthesis of various cobalt-based magnetic materials. These materials are employed in data storage, permanent magnets, and other electronic components.
Catalysis
Cobalt(II) oxide can function as a catalyst or catalyst precursor in certain chemical reactions. Its catalytic properties are explored in industrial processes, including oxidation and hydrogenation reactions.
Reagent in Chemical Synthesis
As an inorganic compound, Cobalt(II) oxide is utilised in laboratories as a reagent for the preparation of other cobalt-containing compounds and materials for research and development.
| Molecular weight | 74.93 |
|---|---|
| Linear formula | CoO |
| Form | powder |
| Particle size | −325 mesh |


Hazard statements
- H302Harmful if swallowed
- H317May cause an allergic skin reaction
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P501Dispose of contents and container per local regulations
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3288 6.1/PG 3 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn,N |
| Risk statements (R) | 22-43-50/53 |
| Safety statements (S) | 24-37-60-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Cobalt(II) oxide used for?
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Cobalt(II) oxide is used as a pigment in glass and ceramics, as a precursor for magnetic materials, in catalysis, and as a reagent in chemical synthesis.
What are the CAS number and formula for Cobalt(II) oxide?
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The CAS number for Cobalt(II) oxide is 1307-96-6 and its chemical formula is CoO.
What grade and purity does Tech Serve Solutions supply for Cobalt(II) oxide?
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Tech Serve Solutions supplies Cobalt(II) oxide as a powder with a particle size of -325 mesh. We do not represent this product as USP, BP, or EP grade.
What are the safety considerations when handling Cobalt(II) oxide?
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Cobalt(II) oxide is harmful if swallowed, may cause an allergic skin reaction, and is very toxic to aquatic life with long lasting effects. It requires personal protective equipment including a dust mask type N95, eyeshields, faceshields, and gloves.
How is Cobalt(II) oxide packed and shipped?
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Cobalt(II) oxide is shipped as UN 3288, Class 6.1, Packing Group 3. Specific packaging details for export can be discussed upon enquiry.
How can I request a sample or quote for Cobalt(II) oxide?
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To request a sample or quote for Cobalt(II) oxide, please contact our sales team through our website or by phone.
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