| Synonyms | Sodium glutamate, MSG |
| Definition | |
| Chemical name | Monosodium L-glutamate monohydrate |
| Einecs | 205-538-1 |
| Chemical formula | C5H8NaNO4 · H2O |
| Molecular weight | 187,13 |
| Assay | Content not less than 99,0 % and not more than 101,0 % on the anhydrous basis |
| Description | White, practically odourless crystals or crystalline powder |
| Identification | |
A.Positive test for sodium | |
B.Positive test for glutamic acid by thin-layer chromatography | |
C.Specific rotation [α]D 20 | Between 24,8o and 25,3o |
| (10 % solution (anhydrous basis) in 2N HCl, 200 mm tube) |
D.pH of a 5 % solution | Between 6,7 and 7,2 |
| Purity | |
| Loss on drying | Not more than 0,5 % (98 oC, 5h) |
| Chloride | Not more than 0,2 % |
| Pyrrolidone carboxylic acid | Not more than 0,2 % |
| Lead | Not more than 2 mg/kg |