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5 Kilogram |
Negotiable |
Cobamamide VB12 Vitamin B12
we have GMP CP2010 standard
Cobamamide
Appearance |
Dark red crystal or noncrystalline powder |
Identification 1(UV) |
The absorption exihibits maxima at 264nm、285nm、305nm、460nm |
Identification 2(HPLC) |
The principal peak obtained with the test solution for assay is consistent with the reference solution in retention time |
Identification 3(IR) |
The infrared absorbtion altas of this production should be consistent with the standard |
Hydroxocobalamin (UV) |
A460/A352≥0.90 |
Related substance (HPLC) |
≤1.0% |
Loss on drying |
≤12.0% |
Assay (on anhydrous basis)(HPLC) |
98.0%~102.0% |
Residual solvent(GC)
|
Acetone≤0.5%
|
|
Ethanol≤0.5% |
|
Total plate count ≤1000cfu/g (plate culture) |
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