Monopotassium glutamate

Monopotassium glutamate (MPG) is a compound with formula KC₅H₈NO₄. It is a potassium acid 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
CAS Number	540778-10-7 Y
3D model (JSmol)	Interactive image
ChemSpider	13228 Y
ECHA InfoCard	100.039.161
E number	E622 (flavour enhancer)
PubChem CID	23669634
CompTox Dashboard (EPA)	DTXSID6044228
InChI 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 Y Key: HQEROMHPIOLGCB-UHFFFAOYSA-M Y 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
SMILES [K+].O=C([O-])C(N)CCC(=O)O
Properties
Chemical formula	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).
Y verify (what is YN ?)
Infobox references

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