| Appearance | Light yellow particles |
| Assay ( as C6H14N2O2-HCI ) | >= 98.5% |
| Specific Rotation | +18.0 ~ +21.5 |
| Loss on Drying | <= 1.0% |
| Residue on Ignition | <= 0.3% |
| Ammonium Salt ( as Nh4+ ) | <= 0.04% |
| Heavy Metals ( as Pb ) | <= 30 ppm |
| Arsenic ( as As ) | <= 2 ppm |



Hai Au Station Da Nang Airport, Da Nang city, Qu?y 51, S?nh n?i ??a, sân bay, Hòa Thu?n Tây, H?i Châu District Counter 51, Domestic Hall, Da Nang Airport, Hòa Thu?n Tây, H?i Châu, ?à N?ng 550000, Vietnam
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