ANNEX I

E 632 DIPOTASSIUM INOSINATE

Synonyms

Potassium inosinate, potassium 5'-inosinate

Definition

Chemical name

Dipotassium inosine-5'-monophosphate

Einecs

243-652-3

Chemical formula

C10H11K2N4O8P

Molecular weight

424,39

Assay

Content not less than 97,0 % on the anhydrous basis

Description

Odourless, colourless or white crystals or powder

Identification

A.

Positive test for ribose, and for organic phosphate and for potassium

B.

pH of a 5 % solution

Between 7,0 and 8,5

C.

Spectrometry:

maximum absorption of a 20 mg/l solution in 0,01N HCl at 250 nm

Purity

Water

Not more than 10,0 % (Karl Fischer)

Other nucleotides

Not detectable by thin-layer chromatography

Lead

Not more than 2 mg/kg