China Amino Acid L-Histidine, L Histidine, Histidine USP CAS No 71-00-1, Find details about China Histidine, L-Histidine from Amino Acid L-Histidine, L Histidine, Histidine USP CAS No 71-00-1
Tests | Limits | Test results |
Description | White crystals or crystalline powder | conforms |
Identification(IR) | concordant with the reference spectrum | conforms |
Solubility | Soluble in water; very slightly soluble in alcohol; insoluble in ether | conforms |
Assay(on dried basis) | 98.5~101.5% | 99.7% |
pH | 7.0~8.5 | 7.9 |
Specific rotation D | +12.6°~+14.0° | +12.8° |
Chloride(Cl) | ≤0.05% | <0.05% |
Sulfate(SO4) | ≤0.03% | <0.03% |
Iron(Fe) | ≤30ppm | <30ppm |
Loss on drying | ≤0.20% | 0.11% |
Residue on ignition | ≤0.40% | 0.06% |
Chromatographic purity | individual impurity ≤0.5% total impurities≤ 2.0% | conforms |
Conclusion: Passed Standard of USP41. | ||