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Vitamin B12 Cyanocobalamin is a synthetic (man-made) form of vitamin B12. Naturally occurring vitamin B12 is found in fish, seafood, milk, egg yolk and fermented cheeses.
| Test Items | Requirements | Results |
|---|---|---|
| Appearance | Dark red crystals or amorphous or crystalline red powder | Complies |
| Identification A | UV: The absorption spectrum exhibits maxima at 278±1nm, 361±1nm, and 550±2nm. | Complies |
|
A361 nm/A278nm : 1.70~1.90 A361 nm/A550nm : 3.15~3.40 |
1.85 3.25 |
|
| Identification B | Cobalt: Meets USP requirements | Complies |
| Identification C | HPLC: The retention time of the major peak of the sample solution corresponds to that of the standard solution | Complies |
| Loss on drying | ≤10.0% | 2.4% |
| Assay | 97.0%~102.0% | 99.3% |
| Related substances | Total impurities ≤3.0% | 0.6% |
| 7β, 8β-Lactocyanocobalamin ≤1.0% | 0.3% | |
| 34-Methycyanocobalamin ≤2.0% | <0.1% | |
| 8-Epi-cyanocobalamin ≤1.0% | 0.1% | |
| Any other unidentified and 50-Carboxycyanocobalamin, 32-Carboxycyanocobalamin ≤0.5% | <0.5% | |
| Acetone | ≤5000ppm | 18ppm |
| Total aerobic microbial count | ≤5000cfu | <10cfu/g |
| Yeasts and Mold | ≤100cfu | <10cfu/g |
| Weight | Packing method |
|---|---|
| 1kg | bag/kg, box outside (double plastic bag + Aluminum foil bag inside) |
| 10kgs, 25kg or more | by Drums or carton (2 layers plastic bag inside) |
| Weight | Delivery method | Delivery time | Destination |
|---|---|---|---|
| 1kg-25kgs | EMS, DHL, UPS, Fedex | 3-7 days | Door to door |
| 25kgs-100kgs | DHL, FedEx, by Air | 3-7 days | Door to door (to Airport by Air) |
| More than 100kgs | by Air | 3-7 days | Door to Airport |
| by Sea | 10-35 days | Door to port |
