Used primarily as an alkylating agent in organic synthesis, enabling the introduction of cyclopentylmethyl groups into molecules. It serves as a building block in the preparation of pharmaceuticals, agrochemicals, and fine chemicals. Its reactivity makes it valuable for forming carbon-carbon bonds through nucleophilic substitution reactions. Commonly employed in research settings for synthesizing cyclic organic compounds, especially in the development of active ingredients requiring a cyclopentylmethyl moiety.