| Color | White |
| Form | Crystalline powder |
| Flavor, Taste & Odor | Strongly acid taste |
| Identification | Infrared absorption |
| Assay (dry basis) | 98.5%-101.5% |
| pH Value | 1.5-2.0 |
| Specific Rotation | Between +5.6° and +8.9° |
| Other Amino Acids | Not detected |
| Appearance of Solution | Clear and colorless |
| Transmissivity | ≥ 98.0% |
| Sulfate (as SO4) | ≤ 0.03% |
| Ignition Residue | < 0.1% |
| Heavy Metals | ≤ 0.00 15% (as Pb) |
| Arsenic (As) | ≤ 1 ppm |
| Iron (Fe) | ≤ 0.003% |
| Chloride | 19.89%-20.29% |
| Orgaic Volatile Impurities | Meet the requirements |
| Ammonium (NH4) | ≤ 0.002% |
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