Commission Directive 2008/84/EC of 27 August 2008 laying down specific purity criteria on food additives other than colours and sweeteners (Text with EEA relevance) (Codified version) (repealed) (c. 84)

ANNEX I U.K.

E 624 MONOAMMONIUM GLUTAMATE U.K.

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]D 20	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