2Pentanone

2-Pentanone, also called pentan-2-one or sec-pentanone, is an organic ketone with the formula C5H10O. Its structure features a carbonyl group adjacent to a methyl group and a propyl group (CH3-CO-CH2-CH2-CH3). It is a colorless liquid with a characteristic fruity odor.

Preparation and production: In industry, 2-pentanone is typically produced by oxidation of secondary alcohols such as 2-pentanol. It can also arise as a byproduct in the catalytic oxidation of hydrocarbons and in routes that target other pentanone isomers.

Applications: It is used as a solvent in paints, coatings, inks, and adhesives, and serves as an intermediate in organic synthesis. It also appears in some fragrances and flavor formulations as a note contributing to fruity characteristics.

Properties: 2-Pentanone has a boiling point near 100–103°C and a moderate vapor pressure at room temperature. It is immiscible with water to a degree and mixes with many organic solvents such as ethers, alcohols, and aromatics. It is a flammable liquid and should be handled away from heat sources and oxidizers.

Safety and handling: Exposure can irritate the eyes, skin, and respiratory tract. Inhalation or ingestion should be avoided; use in a well-ventilated area with appropriate personal protective equipment. Waste and spills should be managed according to local regulations.

See also: other simple ketones such as 2-butanone and 2-pentanone isomers.