CAS number： 67-03-8
Molecular formula： C12H17ClN4OS.HCl
molecular weight： 337.26712
Chemical structure：
| Name of Product | Vitamin B1 Hcl/Thiamine Hydrochloride | |
| Shelf Life | 3 years | |
| Test Items | Specification | Results of Analysis |
| Appearance | white or almost white crystalline powder or colourless crystals | White cyrstalline powder |
| Identification | (1) should be positive reaction | (1) positive reaction |
| (2) Consistent with the reference IR spectra | (2) Consistent with the reference IR spectra | |
| Appearance of solution | clear, not more intense than Y7 | clear, not more intense than Y7 |
| Sulphates | NMT300ppm | ＜300ppm |
| Limit of nitrate | No brown ring | No brown ring |
| Heavy Metals | NMT 20ppm | ＜20ppm |
| Water | NMT 5.0% | 2.1% |
| Residue on igonition | NMT 0.1% | 0.04% |
| Absorbance of solution | NMT 0.025 | 0.025 |
| Residual Solvents | ||
| Methanol | NMT 0.3% | ＜0.3% |
| Ethanol | NMT 0.5% | ＜0.5% |
| Related substances (Disregard limit 0.05%) | ||
| Any impurity | NMT 0.4% | 0.07% |
| Total Impurities | NMT 1.0% | 0.17% |
| Conclusion | This batch comlies with the specification of BP2015/USP38. | |
