Butyl acetate


n-Butyl acetate, also known as butyl ethanoate, is an ester that is a colorless, flammable liquid at room temperature. It is found in many types of fruit, where along with other chemicals, it imparts characteristic flavors and has a sweet smell of banana or apple. It is used as a synthetic fruit flavoring in foods such as candy, ice cream, cheeses, and baked goods. Butyl acetate is often used as a high-boiling solvent of moderate polarity. It is also used as a solvent in nail polish along with ethyl acetate.
The other three isomers of butyl acetate are isobutyl acetate, tert-butyl acetate, and sec-butyl acetate.

Production

Butyl acetates are commonly manufactured by the Fischer esterification of butanol and acetic acid with the presence of catalytic sulfuric acid under reflux conditions with this reaction:

Occurrence in nature

Apples, especially of the 'Red Delicious' variety, are flavored in part by this chemical. The alarm pheromones emitted by the Koschevnikov gland of honey bees contain butyl acetate.