It is a colorless liquid with the formula (CH2CO2Et)2 (Et = ethyl).
This ester is a versatile chemical intermediate.
A colorless liquid, diethyl succinate is formed by Fischer esterification of succinic acid and ethanol.
Being a diester, diethyl succinate is a particularly versatile building block.
[1] Via condensation with oxalate esters, it serves as a precursor to ketoglutaric acid.