3-Pentanone, also known as diethyl ketone, is an organic compound with the chemical formula C5H10O. It is a colorless liquid, slightly soluble in water, and is primarily used as a solvent or as an intermediate in pharmaceutical synthesis.

Density: 0.796 g/cm3

CAS Registry Number: 96-22-0

Melting Point: -42°C

Boiling Point: 101°C

Flash Point: 12.8°C

Refractive Index: 1.392 (20°C)

Critical Pressure: 3.729 MPa

Critical Temperature: 288.3°C

Ignition Temperature: 452°C

Saturated Vapor Pressure: 3.49 kPa (20°C)