Calcium diglutamate

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Calcium diglutamate
IUPAC name
Calcium bis[(2S)- 2-amino-4-carboxy-butyrate]
Other names
Calcium glutamate, L-Glutamic acid calcium salt
3D model (JSmol)
Abbreviations CDG
ECHA InfoCard 100.025.307 Edit this at Wikidata
E number E623 (flavour enhancer)
  • InChI=1/2C5H9NO4.Ca.2H/c2*6-3(5(9)10)1-2-4(7)8;;;/h2*3H,1-2,6H2,(H,7,8)(H,9,10);;;/p-4/t2*3-;;;/m00.../s1/r2C5H9NO4.CaH2/c2*6-3(5(9)10)1-2-4(7)8;/h2*3H,1-2,6H2,(H,7,8)(H,9,10);1H2/p-4/t2*3-;/m00./s1
  • C(CC(=O)[O-])C(C(=O)[O-])N.C(CC(=O)[O-])C(C(=O)[O-])N.[Ca+2]
Molar mass 332.322 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Calcium diglutamate, sometimes abbreviated CDG and also called calcium glutamate, is a compound with formula Ca(C5H8NO4)2. It is a calcium acid salt of glutamic acid. CDG is a flavor enhancer (E number E623)—it is the calcium analog of monosodium glutamate (MSG). Because the glutamate is the actual flavor-enhancer, CDG has the same flavor-enhancing properties as MSG but without the increased sodium content.[1] As a soluble source of calcium ions, this chemical is also used as a first-aid treatment for exposure to hydrofluoric acid.[2]


  1. ^ Ball, P.; Woodward, D.; Beard, T.; Shoobridge, A.; Ferrier, M. (Jun 2002). "Calcium diglutamate improves taste characteristics of lower-salt soup". European Journal of Clinical Nutrition (Free full text). 56 (6): 519–523. doi:10.1038/sj.ejcn.1601343. ISSN 0954-3007. PMID 12032651.
  2. ^ "First Aid for Chemical and Cleanroom Laboratories". Archived from the original on 2009-04-30. Retrieved 2009-06-10.