Triethylsilylcobalt tetracarbonyl

Synonym: Cobalt tetracarbonyl(triethylsilyl), Triethylsilylcobalt tetracarbonyl, Co(SiEt3)(CO)4

CAS Number 14049-72-0 

CAS_14049-72-0_chemical structructure

Product codeCO9720
CAS number14049-72-0
Assay (purity)99%+
Purity methodby integration NMR H1
NMR H1conforms to structure
Molecular weight286.24 g/mol
Melting point-9.3 °C (15.3 °F)
Appearancedark red to black liquid
Sensitivityair, moisture
Molecular formulaC10H15CoO4Si
Linear formulaC10H15CoO4Si
Packagingglassware/metal containers/bubblers

Triethylsilylcobalt tetracarbonyl in the reaction with isobutyraldehyde formed Silyl enol ether. The cleavage of isobutyrylcobalt tetracarbonyl with triethylsilane gives (triethylsilyl)cobalt tetracarbonyl, isobutyraldehyde, dicobalt octacarbonyl, and the corresponding unsaturated and saturated silyl ethers. See links 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 CO9720 contact us at

Safety information

Hazardous class3
Packing groupII
PictogramsGHS02 GHS08 GHS07
Signal wordDANGER
Hazard statementsH225-H315-H319-H334-H335-H336-H351
Precautionary statementsP201-P202-P210-P233-P240-P241-P242-P243-P264-P271-P272-P280-P281-P285-P302 + P352-P303 + P361 + P353-P304 + P340-P305 + P351 + P338-P308 + P313-P312-P333 + P313-P337 + P313-P342 + P311-P362-P363-P370 + P378
Transport descriptionFlammable liquids, n.o.s. (cobalt, tetracarbonyl (trimethylsilyl))
In TSCA registryNo (research and development usage only)

First Aid Measures

General adviceConsult a physician. Show this safety data sheet to the doctor in attendance. Move out of the dangerous area.
Eye contactRinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Skin contactWash off with soap and plenty of water. Consult a physician.
InhalationIf breathed in, move person into the fresh air. If not breathing, give artificial respiration. Consult a physician.
If swallowedDo NOT induce vomiting. Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.


Certificates of Analysis (CoA)

If you don’t see the needed lot of Triethylsilylcobalt tetracarbonyl below please contact customer support at

Lot# 021/184

Known applications and external links

With Triethylsilylcobalt tetracarbonyl other customers often ask:

Ereztech synthesizes and sells additional CO-compounds.

To purchase CO9720 contact us at