Synonym: 1,1′-Diethylcobaltocene, Co(EtCp)2

CAS Number 55940-05-1 | MDL Number MFCD01863655 

(EtCp)2Co chemical structure

Product codeCO0051
CAS number55940-05-1
Assay (purity)97.5%+
Purity methodby gravimetric assay: after reaction with NH4PF6
Molecular weight245.23 g/mol
Appearancethick dark cherry red liquid
Molecular formulaC14H18Co
Linear formula(C2H5C5H4)2Co
Packagingglassware/metal containers/bubblers

Bis(ethylcyclopentadienyl)cobalt(II) has been used as the metal precursor to grow the Co films by plasma-enhanced atomic layer deposition. Various Co thin films were grown by PE-ALD on a 200 nm SiO2 film, which was deposited on p-type silicon substrates by thermal oxidation. See link below

Ereztech manufactures and sells this product in small and bulk volumes. Glass ampules, bottles or metal ampules or bubblers are available for packaging. For additional analytical information or details about purchasing CO0051 contact us at

Safety information

UNNot regulated
Hazardous classNot regulated
Packing groupNot regulated
Signal wordN/A
Hazard statementsNot a hazardous substance or mixture
Precautionary statementsNot a hazardous substance or mixture
Transport descriptionNONH for all modes of transport
In TSCA registryNo (research and development usage only)

Certificates of Analysis (CoA)

If you don’t see the needed lot of Bis(ethylcyclopentadienyl)cobalt(II) below please contact customer support at


External identifiers for Co(EtCp)2

Pubchem CID90473521
IUPAC Namecobalt;ethylcyclopentane
InchI IdentifierInChI=1S/2C7H9.Co/c2*1-2-7-5-3-4-6-7;/h2*3-6H,2H2,1H3;

Known applications and external links

With Bis(ethylcyclopentadienyl)cobalt(II) other customers often ask:

Ereztech synthesizes and sells additional CO-compounds.

To purchase CO0051 contact us at