Monosodium citrate

Monosodium citrate

Names
Other names sodium dihydrogen 2-hydroxypropane-1,2,3-tricarboxylate
Identifiers
3D model (JSmol)	Interactive image
ChEBI	CHEBI:53258 Y
ChEMBL	ChEMBL1355 Y
ChemSpider	5989 Y
ECHA InfoCard	100.038.834
E number	E331i (antioxidants, ...)
CompTox Dashboard (EPA)	DTXSID80872904
InChI InChI=1S/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 Y Key: HRXKRNGNAMMEHJ-UHFFFAOYSA-K Y 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
SMILES [Na+].[Na+].[Na+].O=C([O-])CC(O)(C([O-])=O)CC(=O)[O-]
Properties
Chemical formula	C6H7NaO7
Molar mass	214.105 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Monosodium citrate, or sodium dihydrogen citrate, is an acid salt with the chemical formula NaH₂C₆H₅O₇, or C₃H₄OH(COOH)₂COONa. Since it has two remaining open spots on the citrate anion, it is used as a relatively strong sequestrant. It is used to prevent platelet clumping in blood samples. It is one of the 3 citric acid salts.

Preparation

Monosodium citrate can be prepared by the direct reaction of sodium carbonate or bicarbonate with citric acid:

NaHCO₃ (s) + C₆H₈O₇ (aq) → NaC₆H₇O₇ (aq) + CO₂ (g) + H₂O (l)

Uses

• An anticoagulant in blood donation