Disodium citrate

Disodium citrate, more properly, disodium hydrogen citrate, is an acid salt of citric acid with the chemical formula Na2C6H6O7. It is used as an antioxidant in food and to improve the effects of other antioxidants.[1] It is also used as an acidity regulator and sequestrant.[1] Typical products include gelatin, jam, sweets, ice cream, carbonated beverages, milk powder, wine, and processed cheeses.

Disodium citrate
Names
IUPAC name
Disodium hydrogen 2-hydroxypropane-1,2,3-tricarboxylate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.005.113
EC Number
  • 205-623-3
E number E331ii (antioxidants, ...)
RTECS number
  • GE7580000
UNII
  • InChI=1S/C6H8O7.2Na/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;2*+1/p-2
    Key: CEYULKASIQJZGP-UHFFFAOYSA-L
  • C(C(=O)[O-])C(CC(=O)[O-])(C(=O)O)O.[Na+].[Na+]
Properties
C6H6Na2O7
Molar mass 236.087 g·mol−1
Appearance white crystalline powder
Melting point 149 °C (300 °F; 422 K)
Hazards
NFPA 704 (fire diamond)
0
1
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Disodium citrate may be used in patients to alleviate discomfort from urinary-tract infections.[2]

References

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