Synonym: Bis(cyclopentadienyl)magnesium, Magnesocene, MgCp2

CAS Number 1284-72-6 | MDL Number MFCD00134487  | EC Number 603-275-0

MgCp2 Chemical Structure

Product codeMG4726
CAS number1284-72-6
Assay (purity)98%+
Metal purity99.99+%-Mg
Purity methodby titration: complexometric
Molecular weight154.49 g/mol
Appearancewhite crystals
Melting point176.0°C (348.8°F)
Boiling point290.0°C (554°F) @ 760 mmHg (decomposes)
Flash point13.9±13.0°C
Sensitivityair, moisture
Molecular formulaC10H10Mg
Linear formulaMg(C5H5)2
Packagingglassware/metal containers/bubblers

Bis(cyclopentadienyl)magnesium(II) is the most popular p-doping precursor for GaN materials in the industry. This product was successfully applied as a precursor for chemical vapor infiltration (CVI) of magnesium metal film on carbon foams at 700-775°C substrate temperature. MgCp2 has been applied as a precursor for the MOCVD growth of MgO as passivating buffer layers for YBa2Cu3O7−x deposition on GaAs substrates. It is also has been applied for the growth of magnesium oxide thin films by atomic layer epitaxy (ALE) with water as an oxygen source, on soda-lime glass and Si(100) as substrates. This product is the most commonly used p-dopant in GaN-based materials as well as GaAs, AlGaAs, InP. 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 MG4726 contact us at

Safety information

Hazardous class4.2 (4.3)
Packing groupI
Signal wordDANGER
Hazard statementsH228-H250-H260-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(cyclopentadienyl) magnesium (II))
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(cyclopentadienyl)magnesium(II) below please contact customer support at

Lot# 020/338

External identifiers for MgCp2

Pubchem CID24942211
IUPAC Namemagnesium; cyclopenta-1,3-diene
InchI IdentifierInChI=1S/2C5H5.Mg/c2*1-2-4-5-3-1;/h2*1-5H;/q2*-1;+2

Known applications and external links

With Bis(cyclopentadienyl)magnesium(II) other customers often ask:

Ereztech synthesizes and sells additional MG-compounds.

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