CAS number： 532-43-4
Molecular formula： C12H17N5O4S
molecular weight： 327.3595
Chemical structure：
| Name of Product | Vitamin B1 Mono/Thiamine Monohydrate | |
| 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 | |
| Ph | 6.8-7.5 | 7.1 |
| 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 |
| Chloride | NMT 600ppm | ＜300ppm |
| Loss on drying | NMT 1.0% | 0.3% |
| Residue on igonition | NMT 0.1% | 0.04% |
| Residual Solvents | ||
| Methanol | NMT 1.0% | ＜0.21% |
| Ethanol | NMT 1.5% | ＜0.33% |
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 | |
