methylcobalamin and its Impurities
A form of vitamin B12, which is a type of cobalamin. It is used for the treatment of pernicious anemia, peripheral neuropathy, and diabetic neuropathy. It occurs naturally and can be prepared synthetically from cyanocobalamin . Reference standards of Methylcobalamin API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

![((2R,3S,4R,5S)-5-(5,6-Dimethyl-1H-benzo[d]imidazol PA 13 0651000](https://pharmaffiliates.com/public/pimages/PA130651000.jpg)
((2R,3S,4R,5S)-5-(5,6-Dimethyl-1H-benzo[d]imidazol-1-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate
((2R,3S,4R,5S)-5-(5,6-Dimethyl-1H-benzo[d]imidazol-1-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl dihydrogen phosphate
Catalogue No.:PA 13 0651000
CAS :
975-91-7
Molecular Formula : C14H19N2O7P
Molecular Weight : 358.29

![(2R,3R,4S,5R)-2-(5,6-Dimethyl-1H-benzo[d]imidazol- PA 13 0651001](https://pharmaffiliates.com/public/pimages/PA130651001.jpg)
(2R,3R,4S,5R)-2-(5,6-Dimethyl-1H-benzo[d]imidazol-1-yl)-5-(hydroxymethyl)tetrahydrofuran-3,4-diol
(2R,3R,4S,5R)-2-(5,6-Dimethyl-1H-benzo[d]imidazol-1-yl)-5-(hydroxymethyl)tetrahydrofuran-3,4-diol
Catalogue No.:PA 13 0651001
CAS :
13082-84-3
Molecular Formula : C14H18N2O4
Molecular Weight : 278.31