Description
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Material: Vitamin B12 (Cyanocobalamin) |
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CAS No.: 68-19-9 |
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ITEM |
STANDARD |
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Characteristics |
Dark red crystals or amorphous or crystalline red powder. |
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Identification A |
UV: The absorption spectrum exhibits maxima at 278±1nm, 361±1nm, and 550±2nm. |
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A361 nm/A278nm: 1.70~1.90 A361 nm/A550nm: 3.15~3.40 |
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Identification B |
Cobalt: Meets USP requirements |
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Identification C |
HPLC: The retention time of the major peak of the sample solution corresponds to that of the standards solution. |
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Loss on drying, % |
≤ 10.0 |
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Assay, % |
97.0~102.0 |
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Related substances, % |
Total impurities ≤3.0 |
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7β, 8β-Lactocyanocobalamin ≤1.0 |
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34-Methylcyanocobalamin ≤2.0 |
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8-Epi-cyanocobalamin ≤1.0 |
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Any other unidentified impurity and 50-Carboxycyanocobalamin. 32-Carboxycyanocobalamin ≤0.5 |
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Acetone, ppm |
≤5000 |
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The total aerobic microbial count, cfu/g |
≤1000 |
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The total combined yeasts/mould count cfu/g |
≤100 |
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Conclusion: |
The above product conforms to USP. Standard. |
