Adenosylcobalamin, also known as coenzyme B12, cobamamide and dibencozide is one of the biologically active forms of vitamin B12. It is used to treat vitamin B12 deficiency due to dietary deficiency or malabsorption.
Adenosylcobalamin is described chemically as Coα-[α-(5,6-dimethylbenzimidazolyl)]-Coβ-(5'-deoxy-5'-adenosyl)cobamide. Its molecular formula is C72H100CoN18O17P, its molecular weight is 1579.
Adenosylcobalamin exists as dark red crystals or a powder that is sparingly soluble in Water and insoluble in Ethanol.