Disodium glutamate

Disodium glutamate (DSG, Na2C5H7NO4) is a salt formed by sodium and glutamic acid.

Formula:

COONa | CH2 | CH2 | CH-NH2 | COONa

Formation
When Monosodium Glutamate is put into a basic environment, MSG is neutralized by the alkaline. In the presence of sodium ions, this reaction will form DSG. In this reaction, a sodium ion replaces hydrogen on the second carboxyl group in glutamic acid.

Odor
DSG has an odor of ammonia.