Aconitic acid

Aconitic acid is an organic acid. The conjugate base of aconitic acid, aconitate is a substrate of the citric acid cycle. It is acted upon by aconitase.

Aconitic acid can be synthesized by dehydration of citric acid using sulfuric acid:
 * (HO2CCH2)2COH(CO2H) → HO2CCH=C(CO2H)CH2CO2H  +  H2O

It was first prepared by thermal dehydration.