Iron(II) citrate
Encyclopedia
Ferrous citrate, or iron(II) citrate, is a chemical compound consisting of one atom of iron (Fe2+) and two citrate anions
Citric acid
Citric acid is a weak organic acid. It is a natural preservative/conservative and is also used to add an acidic, or sour, taste to foods and soft drinks...

. It has the chemical formula FeC6H6O7.

Iron
Iron
Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is the most common element forming the planet Earth as a whole, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust...

(II) becomes less soluble at PH>7. Citrate
Citrate
A citrate can refer either to the conjugate base of citric acid, , or to the esters of citric acid. An example of the former, a salt is trisodium citrate; an ester is triethyl citrate.-Other citric acid ions:...

 is a chelating agent, which results in an easily soluble complex.

It is a common nutritional supplement against iron deficiency.
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