| Assay (perchloric acid titration, calculated on dried substance) | 99.0 - 101.0 % |
| Identity (IR-spectrum) | passes test |
| Appearance | white or almost white, crystalline powder or colorless crystals |
| Appearance of solution (50 g/l; water) | clear and colorless |
| Spec. rotation (α 20/D, 40 g/l, water, calc. on dried substance) | -84.0 to -86.0 |
| Chloride (Cl) | ≤ 200 ppm |
| Sulfate (SO₄) | ≤ 300 ppm |
| Ninhydrin-positive substances (LC)
(any ninhydrin-positive impurity) | ≤ 0.2 % |
| Ninhydrin-positive substances (LC) (ammonium (570 nm)) | ≤ 0.02 % |
| Ninhydrin-positive substances (LC)
(total impurities) | ≤ 0.5 % |
| Loss on Drying (105 °C) | ≤ 0.4 % |
