CAS No.:556-50-3
| Items | Specifications |
| Appearance | White crystalline powder |
| Assay (C4H8N2O3), %(on dried matters) | 98.5~100.5 |
| Transmittance, %( 0.4g /20mL **) | ≥ 98.0 |
| Loss on drying,% (4h, 105 ) | ≤ 0.2 |
| Heavy metals (as Pb),ppm | ≤ 10 |
| Chloride(as Cl),% | ≤ 0.020 |
| Sulphate (as SO4),% | ≤ 0.020 |
| Residue on ignition,% | ≤ 0.1 |
| pH( 5g /100mL **) | 5.5~6.0 |
| Iron (as Fe), ppm | ≤ 20 |
| Arsenic (as As2O3), ppm | ≤ 1 |
| Other amino acid | No detd |
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