Tricarboxylic acid

A tricarboxylic acid is an organic carboxylic acid whose chemical structure contains three carboxyl functional groups (-COOH). The best-known example of a tricarboxylic acid is citric acid.

Citric acid, a type of tricarboxylic acid, is used in the citric acid cycle – also known as tricarboxylic acid (TCA) cycle or Krebs cycle – which is fundamental to all aerobic 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 & 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

• Citric acid cycle (tricarboxylic acid cycle)
• Dicarboxylic acid
• Mellitic acid

• Ryan J. Mailloux, Robin Bériault, Joseph Lemire, Ranji Singh, Daniel R. Chénier, Robert D. Hamel, Vasu D. Appanna (2007). "The Tricarboxylic Acid Cycle, an Ancient Metabolic Network with a Novel Twist.". PLOS ONE 2 (8): e690. doi:10.1371/journal.pone.0000690. PMID 17668068. Bibcode: 2007PLoSO...2..690M. 

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