| Customization: | Available |
|---|---|
| Certification: | ISO |
| Element: | Vitamin B |
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| Analytical Items | Standard |
| Appearance | Dark red crystals or amorphous or crystalline red powder |
| Identification A | UV: The absorption spectrum exhibits maxima at 278±1nm, 361±1nm and 550±1nm |
| A361 nm/A278 nm : 1.70 - 1.90 A361 nm/A550 nm : 3.15 - 3.40 |
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| Identification B | Cobalt: Meets USP requirements |
| Identification C | HPLC: The retention time of the major peak of the sample solution corresponds to that of the standard solution. |
| Loss on drying | ≤10.0% |
| Related substances | Total impurities ≤3.0% |
| 7 ß, 8 ß - Lactocyanocobalamin ≤1.0% | |
| 34-Methylcyanocobalamin ≤2.0% | |
| 8-Epi-cyanocobalamin ≤1.0% | |
| Any other unidentified impurity and 50-Carboxycyanocobalamin, 32-Carboxycyanocobalamin ≤0.5% | |
| Acetone | ≤5000ppm |
| Total aerobic microbial count | ≤1000cfu/g |
| Total combined yeasts/mould count | ≤100cfu/g |
| Assay | 97.0% - 102.0% |
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