hydroxocobalamin

Vitamin B_12b, differing from cyanocobalamin (vitamin B₁₂) in the presence of a hydroxyl ion in place of the cyanide ion at the sixth coordinate position on the cobalt atom. SEE ALSO: vitamin B₁₂. SYN: hydroxocobemine.

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hy·droxo·co·bal·amin hī-'dräk-(.)sō-kō-'bal-ə-mən n a member C₆₂H₈₉CoN₁₃O₁₅P of the vitamin B₁₂ group used in treating and preventing vitamin B₁₂ deficiency

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n.

a cobalt-containing drug administered by injection to treat conditions involving vitamin B₁₂ deficiency, such as pernicious anaemia. Trade names: Cobalin-H, Neo-Cytamen.

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hy·droxo·co·bal·a·min (OH-Cbl) (hi-drok″so-ko-balґə-min) [USP] a cobalamin derivative in which the substituent is a hydroxyl group; it is the naturally occurring form of vitamin B₁₂ (see cyanocobalamin) and is sometimes used as a source of that vitamin.