CAS Registry Number

CAS 120-92-3 — Cyclopentanone

Cyclopentanone is a cyclic ketone with a five-membered ring, widely used as a solvent, intermediate in organic synthesis, and in the production of pharmaceuticals, agrochemicals, and polymers. It is also employed in the manufacture of cyclopentanone resins and as a raw material for synthetic fibers. This clear, colorless liquid has a mild, acetone-like odor and is miscible with most organic solvents. Cyclopentanone has a CAS number of 120-92-3 and carries no signal word under GHS classification, indicating low acute toxicity. It boils at 130–132 °C and has a density of approximately 0.948 g/cm³ at 20 °C. Molekula supplies Cyclopentanone from research to bulk quantities with full documentation and ISO 9001:2015 traceability.