| ≥1 piece |
| index name | specification |
| Specific rotation (C=8.6N HCl) | +20.7 deg -+21.5deg |
| assay ,% | 99.0~100.5 |
| PH value ( 1 g /10 ml solution ) | 5.0 ~ 6.0 |
| loss on drying ,% | ≤ 0.40 |
| heavy metal, ppm | ≤ 10 |
| Transmittance ( 1 g /10 ml solution ),% | ≥ 98.0 |
| residue on ignition ,% | ≤ 0.1 |
| chloride ,% | 19.12~19.51 |
| sulfate ,% | ≤ 0.020 |
| arsenic salts, ppm | ≤ 1 |
| iron , ppm | ≤ 10 |
| other Amino acids | past test |
| ammonium salts ,% | ≤ 0.02 |