Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Butylethylmagnesium is highly reactive both towards oxygen (air) and water. It is an infusible solid, however, because of difficulties in handling undiluted butylethylmagnesium and the manufacturing processes used, it is exclusively marketed in liquid state (hydrocarbon solutions) and shipped under UN transport class 4.2 (substances liable to spontaneous combustion / pyrophoric liquids) or at least under class 4.3 (substances which in contact with water emit flammable gases).Since the substance is a transported intermediate, no extra testing was done.

Butylethylmagnesium solutions are organometallic colourless clear liquids (pyrophoricity is concentration and solvent dependent). The neat pyrophoric substance degrades before melting or boiling above 150 oC. The density and vapour pressure are waived. The contribution of the solvent vapour pressure will be higher than of the substance. The substance is water reactive so partition coefficient, water solubility and surface tension are waived. Since butylethylmagnesium is already classified as pyrophoric and water reactive, flash point, autoflammability, flammability and oxidising properties are waived.

Butylethylmagnesium is non explosive.