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Atricarboxylic acid is anorganiccarboxylic acid whosechemical structure contains threecarboxylfunctional groups (−COOH). The best-known example of a tricarboxylic acid iscitric acid.
Citric acid, a type of tricarboxylic acid, is used in thecitric acid cycle – also known as thetricarboxylic acid (TCA)cycle orKrebs cycle – which is fundamental to allaerobic organisms.
| Common name | IUPAC name | Molecular formula | Structural formula |
|---|---|---|---|
| citric acid | 2-hydroxypropane-1,2,3-tricarboxylic acid | C6H8O7 |  |
| isocitric acid | 1-hydroxypropane-1,2,3-tricarboxylic acid | C6H8O7 |  |
| aconitic acid | prop-1-ene-1,2,3-tricarboxylic acid | C6H6O6 |   (cis-form and trans-form) |
| propane-1,2,3-tricarboxylic acid | propane-1,2,3-tricarboxylic acid | C3H5(COOH)3 |  |
| agaric acid | 2-hydroxynonadecane-1,2,3-tricarboxylic acid | C22H40O7 |  |
| trimesic acid | benzene-1,3,5-tricarboxylic acid | C9H6O6 |  |
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