Synonym: Bis(methyl-n5-cyclopentadienyl)magnesium, Magnesocene,1,1′-dimethyl-, (MeCp)2Mg

CAS Number 40672-08-0 | EC Number 635-143-3

(MeCp)2Mg Chemical Structure

Product codeMG2080
CAS number40672-08-0
Assay (purity)99%
Metal purity99.99%-Mg
Purity methodby NMR
NMR H1conforms to structure
Molecular weight182.55 g/mol
AppearanceYellow liquid
Melting point29°C
Boiling point84 – 86 °C @ 1 torr
Molecular formulaC12H14Mg
Linear formula(CH3C5H4)2Mg
Packagingglassware/metal containers/bubblers

Bis(methylcyclopentadienyl)magnesium has been used as a precursor for investigating the incorporation of Mg in metalorganic vapor phase epitaxy (MOVPE) GaN. Two different Mg precursors have been used: bis-methylcyclopentadienyl magnesium [(MeCp)2Mg] and Solution bis-cyclopentadienyl magnesium [Solution Cp2Mg]. SIMS analysis reveals an increased (twofold) efficiency of Mg incorporation for Solution Cp2Mg as compared to (MeCp)2Mg. This product also has been used as one of the components in the combination of precursors for the growth of ZnSe, ZnSSe, and ZnMgSSe. 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 MG2080 contact us at

Safety information

Hazardous class4.2 (4.3)
Packing groupI
Signal wordDANGER
Hazard statementsH228-H250-H261-H314-H318-H335
Precautionary statementsP210-P222-P223-P231 + P232-P240-P241-P260-P264-P271-P280-P301 + P330 + P331-P303 + P361 + P353-P304 + P340-P305 + P351 + P338-P310-P334 + P335-P363-P370 + P378
Transport descriptionOrganometallic substance, solid, pyrophoric, water-reactive (Bis(methylcyclopentadienyl)magnesium)
In TSCA registryYes

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(methylcyclopentadienyl)magnesium below please contact customer support at

Lot# 029/178 Lot# 031/369 Lot# 602-001/034

External identifiers for (MeCp)2Mg

Pubchem CID21946148
IUPAC Namemagnesium;2-methylcyclopenta-1,3-diene
InchI IdentifierInChI=1S/2C6H7.Mg/c2*1-6-4-2-3-5-6;/h2*2-5H,1H3;/q-5;-1;+2

Known applications and external links

With Bis(methylcyclopentadienyl)magnesium other customers often ask:

Ereztech synthesizes and sells additional MG-compounds.

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