Cyclopropylmagnesium bromide is a useful research chemical. Cyclopropylmagnesium bromide Grignard reagent is usually used in the form of a solution, generally showing a light gray to light brown transparent solution. They generally exist as intermediate states of alkylmagnesium halides (ChemicalbookRMgX) and dialkylmagnesiums (R2Mg), in equilibrium mixtures with complex components (called "Schlenk equilibria"). Cyclopropylmagnesium bromide was used as a Grignard reagent.