Product: 75-16-1 Methylmagnesium Bromide

Methylmagnesium Bromide, typ. 35 % solution in Diethylether (typ. 3.0 M)

CH₃BrMg

CAS Number: 75-16-1
EC Number: 200-844-1
Material REACH Number: 01-2120119138-61-0000

Methylmagnesium Bromide (CAS 75-16-1) is an organomagnesium (Grignard) reagent with molecular formula CH3BrMg. It is supplied as a typical 35% solution in Diethylether.

In organic synthesis it is used in Grignard-type reactions as a reactive carbon nucleophile. Grignard-reactions: reagent for the introduction of the methyl group.

Many reagents in this class react readily with moisture and oxygen. Handle under dry, inert conditions using air‐ and water‐free techniques, and add slowly/with cooling when quenching or charging to control heat release. Consult the SDS and site-specific procedures for compatible materials, fire response, and storage.

Physical and Chemical Properties
Property Value
IUPAC Name
magnesium;carbanide;bromide
Molecular Weight
119.24g/mol
Appearance
Liquid
Color
Dark Gray Brown
Crystallization Temperature
< -10 °C
Flash Point
-45 °C 1,013 hPa (Diethyl ether)
Boiling Point
ca. 34.7 °C at 1,013 hPa (Diethyl ether)
Density
ca. 1.04 g/cm3 at 20 °C
Solubility in Water
(Not applicable)
Thermal Stability
Crystallization below around 10 °C

Applications

Grignard-reactions: reagent for the introduction of the methyl group.

Specifications

  • Methylmagnesium Bromide: 34.0 – 36.0 %

    Method of Analysis

    Determination of assay as total base by acidimetric titration after hydrolysis; detailed description available on request.

    Handling and Storage

    Handling Instructions

    Organomagnesium compounds should only be handled under inert gas (nitrogen orargon). Never add water, acids or oxidizing materials to the product. Vapors mayform explosive mixtures with air. Vapors are heavier than air and may spread alongfloors. Flash back possible over considerable distance. Use only explosion proofequipment. Protect from frost, heat and sunlight. In case of fire use dryextinguishers on basis of sodium chloride or limestone powder. Never use water orCO2-extinguishers. Pay attention to official safety regulations (see also: ”Transportregulations” and “GHS Hazard Pictograms“).

    Storage Instructions

    When stored according to SDS the material is fairly stable. We still recommend toretest the material 6 months after date of analysis if included on CoA. If notincluded, use the date of manufacturing for the calculation.Keep container dry and tightly closed. As the material tends to crystallise at lowertemperatures it should be stored above 0°C.