2-Methyl-1-naphthylmagnesium bromide is primarily used as a Grignard reagent in organic synthesis. It plays a key role in forming carbon-carbon bonds, making it valuable for constructing complex organic molecules. The reagent is often employed in the preparation of pharmaceuticals, agrochemicals, and fine chemicals. It reacts with various electrophiles, such as carbonyl compounds, to produce alcohols, ketones, or other derivatives. Additionally, it is utilized in the synthesis of naphthalene-based compounds, which are important in materials science and dye manufacturing. Its reactivity and specificity make it a versatile tool in synthetic chemistry laboratories.