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Iodine

  • Page ID
    78278
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    • Molecular formula: I2
    • Molar mass: 253.809
    • CAS Registry Number: 7553-56-2
    • Appearance: Iodine, resublimed crystals, ACS, 99.8%; Iodine, 0.01N Standardized Solution; Iodine, 0.1N Standardized Solution; Iodine, 1.0N Standardized Solution; Iodine, crystalline, 99.99+% (metals basis); Iodine spheres, ultra dry, -10 mesh, 99.999% (metals basis); Iodine, resublimed crystals, Puratronic®, 99.9985% (metals basis); Iodine, resublimed crystals, ACS, 99.8%; Iodine, 0.01N Standardized Solution; Iodine, 0.1N Standardized Solution; Iodine, 1.0N Standardized Solution; Iodine, crystalline, 99.99+% (metals basis); Iodine spheres, ultra dry, -10 mesh, 99.999% (metals basis); Iodine, resublimed crystals, Puratronic®, 99.9985% (metals basis); Violet solid with a sharp, characteristic odor.; Purple to black crystals
    • Melting point: 113 to 114 °C
    • Boiling point: 183 to 184 °C
    • Solubility: Water, 330 mg/L (25 deg C)
    • Safety sheet: Not available
    • Spectra: Check on SDBSAdd Spectra (Help).

    From Wikipedia

    Iodine is a chemical element with symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at a standard conditions that sublimes readily to form a violet gas. The elemental form was discovered by the French chemist Bernard Courtois in 1811. It was named two years later by Joseph-Louis Gay-Lussac from this property, after the Greek ἰωδης"violet-coloured".

    Iodine occurs in many oxidation states, including iodide (I), iodate (IO3-), and the various periodate anions. It is the least abundant of the stable halogens, being the sixty-first most abundant element. It is even less abundant than the so-called rare earths. It is the heaviest essential element. Iodine is found in the thyroid hormones. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities.

    The dominant producers of iodine today are Chile and Japan. Iodine and its compounds are primarily used in nutrition. Due to its high atomic number and ease of attachment to organic compounds, it has also found favour as a non-toxic radiocontrast material. Because of the specificity of its uptake by the human body, radioactive isotopes of iodine can also be used to treat thyroid cancer. Iodine is also used as a catalyst in the industrial production of acetic acid and some polymers.

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    Other names

    Iodine (IUPAC Name); Diiodan