Cobalt

Dr Daniel J Bell et al.

Cobalt (chemical symbol Co) is an essential trace element. Its most important function in humans is as the active metal atomic center of vitamin B12.

Cobalt is a shiny grey-silvery transition metal with an atomic number 27 and atomic weight 58.93. Its oxidation states are +1 and +2. 

Cobalt is found in fish, nuts, leafy vegetables, and cereal grains.

Chronic cobalt poisoning is rare and was formerly seen in chronic beer drinkers as cobalt chloride was added to beer to maintain a nice foamy head. Sequelae of toxicity include vomiting, sensorineural deafness, tinnitus and cardiomyopathy 5,6

  • vitamin B12 (cobalamin) is a complex structure and central to it is a cobalt ion within a corrin ring. Vitamin B12 is vital for the normal functioning of every cell in the human body, being key to DNA synthesis. 
  • Georg Brandt discovered cobalt in 1739 4. It was a difficult metal to extract from its ore and miners put this down to goblins who had cast evil magic upon the rock. The German word for goblin, Kobbold, was subsequently adopted for this new element. Interestingly cobalt was the first metal to be discovered that was not known to the ancients.
  • Bertrand and Macheboeuf first discovered cobalt in animal cells in 1925, this was later corroborated by more sophisticated spectrographic techniques.
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Article information

rID: 67034
Section: Pathology
Synonyms or Alternate Spellings:
  • Cobalt (Co)

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