China L-Cysteine 99% Food Grade, Find details about China Amino Acid, Nutritional Supplement from L-Cysteine 99% Food Grade
| Analytical Items | Standard |
| Appearance | White crystals or crystalline powder |
| Assay | 98.0~101.0% |
| pH value | 4.5~5.5 |
| Specific optical rotation[a]D20° | +8.3o~ +9.5o |
| State of solution (Transmittance) | ≥95.0% |
| Loss on drying | ≤0.5% |
| Residue on ignition | ≤0.1% |
| Chloride (Cl) | ≤0.04% |
| Sulfate (SO4) | ≤0.03% |
| Ammonium (NH4) | ≤0.02% |
| Iron (Fe) | ≤0.001% |
| Heavy metals (Pb) | ≤0.001% |
| Arsenic | ≤0.0001% |