Synonym: (EtCp)2Mg; Mg(EtCp)2; Bis(1-ethylcyclopenta-2, 4-dien-1-yl)magnesium; Bis(1-ethyl-2, 4-cyclopentadien-1-yl)magnesium; Magnesium, bis(1-ethyl-2, 4-cyclopentadien-1-yl)-; Magnesium; 2-ethylcyclopenta-1, 3-diene; Magnesium, bis(ethylcyclopentadienyl)-

CAS Number 114460-02-5 | MDL Number MFCD00151375 | EC Number 631-233-1 


Product codeMG0025
CAS number114460-02-5
Assay (purity)98%+
Purity methodby integration NMR
Metal purity99.999%-Mg
Molecular weight210.60 g/mol
Appearancecolorless to light yellow liquid
Boiling point~ 257 °C @ 1 torr
Density0.98 g/ml
NMRconforms to structure
Sensitivityair, moisture
Molecular formulaC14H18Mg
Linear formulaMg(C5H4C2H5)2
Packagingglassware/metal containers/bubblers

Bis(ethylcyclopentadienyl)magnesium is used as a precursor in recent solar energy and water treatment researches. For example, a new process has been developed to deposit magnesium fluoride (MgF2) thin films via atomic layer deposition (ALD) for use as optical coatings in the ultraviolet. The results displayed that this product is a good candidate for a variety of optical applications in the far ultraviolet. See the 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 Bis(ethylcyclopentadienyl)magnesium contact us at


Safety information

Hazardous class4.2 (4.3)
Packing groupI
Signal wordDANGER
Hazard statements
Precautionary statementsP210-P222-P223-P231 + P232-P233-P240-P241-P342-P243-P260-P261-P271-P280-P301 + P330 + P331-P303 + P361 + P353-P304 + P340-P305 + P351 + P338-P310-P334 + P335-P363-P370 + P378
Transport descriptionOrganometallic substance, liquid, pyrophoric, water-reactive (Bis(ethylcyclopentadienyl)magnesium)
In TSCA registryNo (for research and development 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 Bis(ethylcyclopentadienyl)magnesium below please contact customer support at

Lot# 006/573 Lot# 020/353 Lot# 029/188  Lot# 603-003/018 Lot# 029/237

External identifiers for Bis(ethylcyclopentadienyl)magnesium

Pubchem CID22336304
IUPAC Namemagnesium; 2-ethylcyclopenta-1,3-diene
InchI IdentifierInChI=1S/2C7H9.Mg/c2*1-2-7-5-3-4-6-7;/h2*3,5H,2,4H2,1H3;/q2*-1;+2

Known applications and external links

With Bis(ethylcyclopentadienyl)magnesium other customers often ask:

Ereztech synthesizes and sells additional MG-compounds.

To purchase Bis(ethylcyclopentadienyl)magnesium contact us at