Cyclopentanone is widely used as an intermediate in organic synthesis, particularly in the pharmaceutical and agrochemical industries. It serves as a building block for the production of various active ingredients in drugs, including anti-inflammatory and central nervous system agents. Its ring structure makes it valuable in the synthesis of cyclic compounds and natural products.

In the fragrance industry, cyclopentanone is used to manufacture musk-like aroma compounds due to its ability to form stable cyclic ketones that contribute to long-lasting scents in perfumes and cosmetics.

It is also employed in the preparation of polymers and resins, where it acts as a precursor for monomers used in specialty materials. Additionally, cyclopentanone finds use in the development of dyes and pigments, enhancing color stability and reactivity in certain formulations.

Due to its reactivity and solvent properties, it is occasionally used in research laboratories for cyclization and condensation reactions, especially in the formation of five-membered rings in complex molecules.