China (Mainland) 
hydroxocobalamin,vitamin b12,
pharmaceutical ingredient,
in bulk supply,cyanocobalamin,
68-19-9,welcome inquire.
hydroxocobalamin,vitamin b12,cyanocobalamin pharmaceutical ingredient,in bulk supply,welcome inquire
vitamin b12/cyanocobalamin conform to usp34 standard
it is an especially common vitamer of the vitamin b12 family. it is the most famous vitamer of the family, because it is chemically the most air-stable, and it is the easiest to crystallize and therefore easiest to purify after it is produced by bacterial fermentation.
vitamin b12 is necessary for the synthesis of red blood cells, the maintenance of the nervous system, and growth and development in children.
deficiency can cause anemia. vitamin b12 neuropathy, involving the degeneration of nerve fibres and irreversible neurological damage, can also occur.
|
item |
specification |
results |
|
description |
dark red crystalline powder, have no smelly and test less; hygroscopicity. |
complies |
|
identification |
positive |
positive |
|
ratio absorbance |
a361nm/a278nm:1.70-1.90 a361nm/a550nm:3.15-3.40 |
1.86 3.25 |
|
pseudo cyanocobalamin |
complies |
complies |
|
loss on drying |
≤12.0% |
2.6% |
|
assay on dried |
96%-100.5% |
97.8% |
|
bacteria |
≤100cfu/g |
100cfu/g |
|
mould yeasts |
≤100cfu/g |
no found |
|
e coli |
no found |
no found |
|
limit of residual solvents |
acetone≤0.5% |
0.09% |
|
conclusion: the product complies with usp32 standard |
||