Monopotassium glutamate

Monopotassium glutamate (MPG) is the compound with formula KC5H8NO4. It is a potassium salt of glutamic acid.

Monopotassium glutamate
Names
IUPAC name
Potassium 2-amino-5-hydroxy-5-oxopentanoate
Other names
Potassium glutamate; E622; Glutamic acid potassium salt
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.039.161
E number E622 (flavour enhancer)
UNII
  • InChI=1S/C5H9NO4.K/c6-3(5(9)10)1-2-4(7)8;/h3H,1-2,6H2,(H,7,8)(H,9,10);/q;+1/p-1 checkY
    Key: HQEROMHPIOLGCB-UHFFFAOYSA-M checkY
  • InChI=1/C5H9NO4.K/c6-3(5(9)10)1-2-4(7)8;/h3H,1-2,6H2,(H,7,8)(H,9,10);/q;+1/p-1
    Key: HQEROMHPIOLGCB-REWHXWOFAL
  • [K+].O=C([O-])C(N)CCC(=O)O
Properties
C5H8KNO4
Molar mass 185.220 g·mol−1
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

It has the E number E622 and is used in foods as a flavor enhancer. It is a non-sodium MSG alternative.

See also
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