Butyl oleate is a fatty acid ester and an organic chemical found in liquid form.

[2] It is REACH registered and produced or imported into the European Union with the EC number of 205-559-6.

[6] It undergoes the Bouveault–Blanc reduction with oleyl alcohol and butanol as the products.

[8] It has approval for use as a food additive in Europe[9] and also the US by the FDA.

[12][13] Similar to other fatty acid esters, it has found use in biodiesel and as a fuel additive.