Bis(cyclopentadienyl)cobalt(II)
Bis(cyclopentadienyl)cobalt(II), CAS 1277-43-6, with the formula Co(C5H5)2 and a molecular weight of 189.12 g/mol, is an organometallic compound. It is notable for its use as a precursor in chemical vapour deposition (CVD) and atomic layer deposition (ALD) processes. This compound is valuable in materials science for depositing cobalt-containing thin films, particularly in microelectronics applications. It requires storage at 2-8°C.

CVD and ALD Precursor
Bis(cyclopentadienyl)cobalt(II) serves as a precursor for Chemical Vapour Deposition (CVD) and Atomic Layer Deposition (ALD) techniques. It enables the deposition of cobalt-containing thin films.
Materials Science
This organometallic compound finds application in materials science research. It is used for developing novel materials and exploring advanced material properties through thin film deposition.
Micro/Nanoelectronics
Its utility extends to the microelectronics and nanoelectronics sectors. It is employed in processes requiring the precise deposition of conductive or magnetic cobalt layers.
| Molecular weight | 189.12 |
|---|---|
| Linear formula | Co(C5H5)2 |
| Storage temperature | 2-8°C |
| Melting point | 176-180 °C (dec.)(lit.) |


Hazard statements
- H228Flammable solid
- H317May cause an allergic skin reaction
- H334May cause allergy or asthma symptoms if inhaled
- H341Suspected of causing genetic defects
- H351Suspected of causing cancer
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P342
| Protective equipment | Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 1325 4.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,Xn |
| Risk statements (R) | 11-40-42/43-68 |
| Safety statements (S) | 7/9-16-22-33-36/37 |
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 Bis(cyclopentadienyl)cobalt(II) used for?
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Bis(cyclopentadienyl)cobalt(II) is primarily used as a precursor in Chemical Vapour Deposition (CVD) and Atomic Layer Deposition (ALD) for creating cobalt-containing thin films, particularly in materials science and microelectronics.
What are the CAS number and formula for Bis(cyclopentadienyl)cobalt(II)?
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The CAS number for Bis(cyclopentadienyl)cobalt(II) is 1277-43-6, and its chemical formula is Co(C5H5)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Bis(cyclopentadienyl)cobalt(II) typically as a research or technical grade material. We do not represent it as USP, BP, or EP grade unless explicitly stated otherwise. Please contact us for specific lot purity information.
How should Bis(cyclopentadienyl)cobalt(II) be handled safely?
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Bis(cyclopentadienyl)cobalt(II) is flammable (H228) and can cause an allergic skin reaction (H317), serious eye irritation (H319 - inferred from PPE requirement), and may cause allergy or asthma symptoms or breathing difficulties if inhaled (H334). It is suspected of causing genetic defects (H341) and cancer (H351). Always use appropriate personal protective equipment, including eyeshields, suitable gloves, and a respirator, in a well-ventilated area. Handle away from ignition sources.
How is Bis(cyclopentadienyl)cobalt(II) packed, shipped, and exported?
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Bis(cyclopentadienyl)cobalt(II) is packed and shipped according to its hazard classification (UN 1325, 4.1/PGIII). Tech Serve Solutions is experienced in exporting chemicals globally, adhering to all relevant international shipping regulations.
How can I request a quote or sample?
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To request a quote or sample of Bis(cyclopentadienyl)cobalt(II), please contact our sales department via the website or direct email, providing your specific requirements.
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