3-Pentanone

3-Pentanone (also known as diethyl ketone but with systematic name pentan-3-one) is a colorless liquid ketone with an odor like that of acetone. Its formula is C5H10O. It is soluble in about 25 parts water, and miscible with ethanol and diethyl ether.

Two other ketones, which are isomers of 3-pentanone, are 2-pentanone and methyl isopropyl ketone.