ANNEX I

E 624 MONOAMMONIUM GLUTAMATE

Synonyms

Ammonium glutamate

Definition

Chemical name

Monoammonium L-glutamate monohydrate

Einecs

231-447-1

Chemical formula

C5H12N2O4 · H2O

Molecular weight

182,18

Assay

Content not less than 99,0 % and not more 101,0 % on the anhydrous basis

Description

White, practically odourless crystals or crystalline powder

Identification

A.

Positive test for ammonium

B.

Positive test for glutamic acid by thin-layer chromatog-raphy

C.

Specific rotation [α]D20

Between 25,4o and 26,4o

(10 % solution (anhydrous basis) in 2N HCl, 200 mm tube)

D.

pH of a 5 % solution

Between 6,0 and 7,0

Purity

Loss on drying

Not more than 0,5 % (50 oC, 4h)

Sulphated ash

Not more than 0,1 %

Pyrrolidone carboxylic acid

Not more than 0,2 %

Lead

Not more than 2 mg/kg