| Assay (perchloric acid titration, calculated on dried substance) | 99.0 - 101.0 % |
| Identity (IR-spectrum) | passes test |
| Identity (specific rotation) | passes test |
| Spec. rotation (α 20/D, 10 g/l, water, calc. on dried substance) | -30.0 to -33.0 |
| Appearance | white to almost white, crystalline or amorphous powder |
| Appearance of solution (10 g/l, Hydrochloric acid 1 mol/l) | clear and colorless |
| Chloride (Cl) | ≤ 200 ppm |
| Sulfate (SO₄) | ≤ 300 ppm |
| Fe (Iron) | ≤ 20 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; 3 h) | ≤ 0.3 % |
