Chemistry:Iron(II) citrate
_citrate-skel.svg) Skeletal formula of iron(II) citrate
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_Citrate_Hydrate.jpg) Powdered Iron(II) citrate hydrate
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| IUPAC name
Iron(II) hydrogen 2-hydroxy-1,2,3-tricarboxylpropane
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| Other names
Iron(II) citrate, Ferrous citrate, Iron citrate
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3D model (JSmol)
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| Properties | |
| FeC6H6O7 | |
| Molar mass | 245.95644 g/mol |
| Appearance | slightly gray-green powder or white crystals[1] unstable |
| Density | 1.91 g/cm3 |
| Melting point | decomposes[2] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Ferrous citrate, also known as iron(II) citrate or iron(2+) citrate, describes coordination complexes containing citrate anions with Fe2+ formed in aqueous solution. Although a number of complexes are possible (or even likely), only one complex has been crystallized. That complex is the coordination polymer with the formula [Fe(H2O)6]2+{[Fe(C6H5O7)(H2O)]−}2.2H2O, where C6H5O73- is HOC(CH2CO2−)2(CO2−, i.e., the triple conjugate base of citric acid wherein the three carboxylic acid groups are ionized.[3] Ferrous citrates are all paramagnetic, reflecting the weak crystal field of the carboxylate ligands.[4]
Ferrous citrates are produced by treating disodium citrate Na2C6H6O7 with sources of iron(II) aquo complexes, such as iron(II) sulfate.[5][2] Ferrous citrates are all highly unstable in air, converting to ferric citrates.
It is a nutrient supplement approved by the FDA.[6][7]
See also
References
- ↑ Food Chemicals Codex (US Pharmacopeia Conv, 2010 - 1405 pages), page 396 – https://books.google.com/books?id=zNr3YaoNZvQC&pg=PA396&hl=vi&sa=X&ved=0ahUKEwiZobTm0rbqAhXKc3AKHfxaDHQQ6AEIQjAE#v=onepage&q&f=false. Accessed July 6, 2020.
- ↑ 2.0 2.1 Handbook of Inorganic Compounds. Boca Raton, Florida: CRC Press. 1995. p. 167. ISBN 0-8493-8671-3. https://books.google.com/books?id=0fT4wfhF1AsC&pg=PA167.
- ↑ 3.0 3.1 Strouse, Jane; Layten, Steven W.; Strouse, Charles E. (1977). "Structural Studies of transition metal complexes of triionized and tetraionized citrate. Models for the coordination of the citrate ion to transition metal ions in solution and at the active site of aconitase". Journal of the American Chemical Society 99 (2): 562–572. doi:10.1021/ja00444a041. PMID 830693.
- ↑ Pierre, J. L.; Gautier-Luneau, I. (2000). "Iron and Citric Acid: A Fuzzy Chemistry of Ubiquitous Biological Relevance". Biometals 13 (1): 91–96. doi:10.1023/A:1009225701332. PMID 10831230.
- ↑ "CFR - Code of Federal Regulations Title 21". U.S. Food and Drug Administration. 2013-06-01. http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?fr=184.1307c.
- ↑ PubChem. "Iron(II) citrate" (in en). https://pubchem.ncbi.nlm.nih.gov/compound/10007596.
- ↑ "Substances Added to Food (formerly EAFUS)" (in en-US). https://www.cfsanappsexternal.fda.gov/scripts/fdcc/index.cfm?set=FoodSubstances&id=FERROUSCITRATE.
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