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Vitamin B12 Structure

Vitamin B12

Chemical Properties

Melting point >300°C
alpha  23656 -59 ± 9° (dil aq soln)
Boiling point >300 °C
Flash point 9℃
storage temp.  2-8°C
solubility  Sparingly soluble in water and in ethanol (96 per cent), practically insoluble in acetone. The anhydrous substance is very hygroscopic.
pka pKa 3.28±0.04(H2O,D2O t=23±0.5 Iunspeci?ed) (Uncertain)
form  Crystalline Powder or Crystals
color  Red to dark red
Odor dark red cryst. or powd., odorless and tasteless
Water Solubility  Soluble
Sensitive  Hygroscopic
Merck  14,10014
BRN  4122889
Exposure limits NIOSH: IDLH 25 mg/m3
Stability Hygroscopic. Keep cold and dry.
InChIKey RMRCNWBMXRMIRW-WZHZPDAFSA-L
LogP 3.570 (est)
Substances Added to Food (formerly EAFUS) VITAMIN B-12
SCOGS (Select Committee on GRAS Substances) Vitamin B12 (cyanocobalamin)
NCI Dictionary of Cancer Terms cyanocobalamin
FDA UNII P6YC3EG204
NCI Drug Dictionary Berubigen
ATC code B03BA01,B03BA51
EPA Substance Registry System Vitamin B12 (68-19-9)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H225-H301+H311+H331-H370
Precautionary statements P210-P260-P280-P301+P310-P311
Hazard Codes 
HS Code  2936260000
Hazardous Substances Data 68-19-9(Hazardous Substances Data)
Toxicity LD50 intravenous in mouse: 2gm/kg
NFPA 704:
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