CAS NO: 5934-29-2
Specification: EP5
| Product Name | L-Histidine hydrochloride Monohydrate |
| Quality Standard | EP5 |
| Testing Items | Critrion |
| Appearance | A white, crystalline powder |
| State of solution | Clear and not more intensely coloured than reference solution BY6 |
| PH | 3.0-5.0 |
| Specific rotation | +9.2°to +10.6º |
| Sulphates | ≤300ppm |
| Ammonium(NH4) | ≤200ppm |
| Iron(Fe) | ≤10ppm |
| Heavy metals(Pb) | ≤10ppm |
| Loss on drying | 7.0%-10.0% |
| Sulphated ash | ≤0.10% |
| Assay | 98.5~101.0% |