Butyl butyrate, or butyl butanoate, is an organic compound that is an ester formed by the condensation of butyric acid and n-butanol. It is a clear, colorless liquid that is insoluble in water, but miscible with ethanol and diethyl ether. Its refractive index is 1.406 at 20 °C.
|Preferred IUPAC name
Butanoic acid butyl ester
Butyric acid butyl ester
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||144.214 g·mol−1|
|Density||0.8692 g/cm3 at 20 °C|
|Melting point||−91.5 °C (−132.7 °F; 181.7 K)|
|Boiling point||165 °C (329 °F; 438 K)|
|R-phrases (outdated)||R10, R36/38|
|NFPA 704 (fire diamond)|
|Flash point||49 °C (120 °F; 322 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Like other volatile esters, butyl butyrate has a pleasant aroma. It is used in the flavor industry to create sweet fruity flavors that are similar to that of pineapple. It occurs naturally in many kinds of fruit including apple, banana, berries, pear, plum, and strawberry.