Citrate

The citrate ion can be written C3H5O(COO)33-, that is, citric acid minus three hydrogen ions.

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Citrates are compounds containing this group, either ionic compounds, the salts, or analogous covalent compounds, esters. An example of a salt is sodium citrate and an ester is trimethyl citrate. See category for a bigger list.

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Since citric acid is a multifunctional acid, intermediate ions exist, hydrogen citrate ion, HC6H5O72- and dihydrogen citrate ion, H2C6H5O7-. These may form salts as well, called acid salts.

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Salts of the hydrogen citrate ions are weakly acidic, while salts of the citrate ion itself (with an inert cation such as sodium ion) are neither acidic nor basic.

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Ion: : This article is about the electrically charged particle. For other uses of this word, see ion (disambiguation)....

Hydrogen ion: Hydrogen ion is recommended by IUPAC as a general term for all ions of hydrogen and its isotopes. Depending on the charge of the ion, two different classes can be distinguished:...

Salt: : This article is about the general chemical term salt. For the everyday meaning, see edible salt or its main ingredient, sodium chloride. For other meanings of the word salt, see salt (disambiguation)....