| Synonyms | Sodium glutamate; MSG |
| Definition | |
|---|---|
| Einecs | 205-538-1 |
| Chemical name | Monosodium L-glutamate monohydrate |
| 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 |
| Solubility | Freely soluble in water; practically insoluble in ethanol or ether |
| Description | White, practically odourless crystals or crystalline powder |
| Identification | |
| Test for sodium | Passes test |
| Test for glutamic acid (by thin-layer chromatography) | Passes test |
| Specific rotation | [α]D20 between + 24,8° and + 25,3° (10 % solution (anhydrous basis) in 2N HCl, 200 mm tube) |
| pH | Between 6,7 and 7,2 (5 % solution) |
| Purity | |
| Loss on drying | Not more than 0,5 % (98 °C, 5 hours) |
| Chloride | Not more than 0,2 % |
| Pyrrolidone carboxylic acid | Not more than 0,2 % |
| Lead | Not more than 1 mg/kg |