Vitamin B12 (Methylcobalamin)
City: LV, Marupe
Please avoid sudden changes in temperature and humidity, as they may affect the condition of derivative ingredients and tablets.
The shelf life begins from the date of manufacture at the factory.
Taking into account logistical and transportation stages, the remaining shelf life of the product is always shorter than the full shelf life.
We ship products to our customers with a remaining shelf life of no less than 70%.
Physical & Chemical Characteristics
Analysis Item | Specification | Result |
Characters | Dark red crystals or crystalline powder | Complies |
Identification (1) | UV: Compare the spectrum with reference — both spectra exhibit similar intensities at same wavelengths | Complies |
Identification (2) | Cobalt: requirement | Complies |
Color of Solution | The solution is clear and red color | Complies |
Size | (≤250um) ≥90% | Complies* |
Impurities
Analysis Item | Specification | Result |
Any impurity (single) | ≤0.5% | 0.5% |
Total impurities | ≤2.0% | 1.3% |
Water | ≤11.5% | ≤5.6% |
Other Tests
Analysis Item | Specification | Result |
Loss on Drying | ≤11.5% | <11.5% |
Residual Solvent (Acetone) | ≤0.5% | 0.07% |
Assay (on the anhydrous basis) | 98.5%-101.0% | 99.0% |
Acetone | ≤5000ppm | 180ppm |
Microbiological Tests
Analysis Item | Specification | Result |
Total Plate Count | ≤1000 CFU/g | 15 CFU/g |
Total combined yeasts/mould count | ≤100 CFU/g | 10CFU/g |
E. coli | Absence (/10g) | Complies* |
Salmonella | Absence (/10g) | Complies* |
Staphylococcus aureus | Absence (/g) | Complies* |
Bile-Tolerant Gram-Negative Bacteria | Absence (/g) | Complies* |
Heavy Metals
Analysis Item | Specification | Result |
Lead (Pb) | ≤0.5 ppm | Complies* |
Arsenic (As) | ≤1.0 ppm | Complies* |
Cadmium (Cd) | ≤1.0 ppm | Complies* |
Mercury (Hg) | ≤0.1 ppm | Complies* |