Chemical Elements History and Information Iodine
About the chemical element Iodine, its symbol, atomic number and weight, who discovered it and when.
The Atomic Elements and Their Uses
(Element) (Symbol) (Atomic number) (Atomic weight)
Iodine I 53 126.9045
Discovered by Bernard Courtois of France in 1811. Extracted from natural brines and ashes of seaweed, it is one of the oldest disinfectants. Today "tincture of iodine" has been largely replaced by iodine complexed with polyvinyl pyrrolidine. Most table salt has iodine added to prevent goiter. Silver iodine is used for seeding clouds.
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