Monosodium citrate

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Monosodium citrate
Monosodium citrate.png
Names
Other names
sodium dihydrogen 2-hydroxypropane-1,2,3-tricarboxylate
Identifiers
  • 18996-35-5 checkY
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.038.834 Edit this at Wikidata
EC Number
  • 242-734-6
E number E331i (antioxidants, ...)
RTECS number
  • GE9750000
UNII
  • InChI=1S/C6H8O7.Na/c7-3(8)1-6(13,5(11)12)2-4(9)10;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);/q;+1/p-1 ☒N
    Key: HWPKGOGLCKPRLZ-UHFFFAOYSA-M ☒N
  • InChI=1/C6H8O7.3Na/c7-3(8)1-6(13,5(11)12)2-4(9)10;;;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);;;/q;3*+1/p-3
    Key: HRXKRNGNAMMEHJ-DFZHHIFOAL
  • C(C(=O)O)C(CC(=O)O)(C(=O)[O-])O.[Na+]
Properties
C6H7NaO7
Molar mass 214.105 g·mol−1
Appearance white powder
hygroscopic
Odor odorless
Melting point 212 °C (414 °F; 485 K)
soluble
Solubility negligible in ethanol
Acidity (pKa) 3.50 - 3.80
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Infobox references

Monosodium citrate, more correctly, sodium dihydrogen citrate (Latin: natrium citricum acidulatum), is an acid salt of citric acid. Disodium citrate and trisodium citrate are also known. It can be prepared by partial neutralisation of an aqueous solution of sodium bicarbonate or carbonate with citric acid.

NaHCO3 + C6H8O7 → NaC6H7O7 + CO2 + H2O

It is highly soluble in water and practically insoluble in ethanol. Monosodium citrate is used as an anticoagulant in donated blood.[1] It is used as an alkalinizing agent to prevent kidney stone disease.[2]

References[edit]

  1. ^ Clinical Hematology: Theory and Procedures, Mary Louise Turgeon
  2. ^ PubChem. "Monosodium citrate". pubchem.ncbi.nlm.nih.gov. Retrieved 2021-08-02.