ITEMS | SPECIFICATIONS | RESULT |
---|---|---|
Appearance | White crystalline powder | Conform |
Assay of Threonine | 99.0 – 100.0% | 99.50% |
Specific rotation | -26.7 to -29.1 | -28.2 |
Loss on drying | 0.2% Max. | 0.12% |
Chloride | 0.05% Max. | 0.03% Max. |
Ammonium | 0.02% Max. | Conform |
Sulphate | 0.03% Max. | Conform |
Iron | 10 ppm Max. | Conform |
Heavy metals | 10 ppm Max. | Conform |
Arsenic | 1 ppm Max. | 0.1 ppm |
Residue on ignition | 0.4% Max. | 0.22% |
pH | 5.0 - 6.5 | 5.8 |
Organic volatile impurities | Meets the requirement | Conform |