Periodic Table of Elements

Element Iodine - I

Comprehensive data on the chemical element Iodine is provided on this page; including scores of properties, element names in many languages, most known nuclides of Iodine. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Iodine Menu

Overview of Iodine

Iodine's Name in Other Languages

  • Latin: Iodum
  • Czech: Jod
  • Croatian: Jod
  • French: Iode
  • German: Jod - r
  • Italian: Iodio
  • Norwegian: Jod
  • Portuguese: Iôdo
  • Russian: Иод
  • Spanish: Yodo
  • Swedish: Jod

Atomic Structure of Iodine

Chemical Properties of Iodine

Physical Properties of Iodine

Regulatory / Health

  • CAS Number
    • 7553-56-2
  • RTECS: NN1575000
  • OSHA Permissible Exposure Limit (PEL)
    • 1 ppm = 10.38mg/m3 @ 25°C & 1 atm
    • Ceiling: 0.1 ppm
  • OSHA PEL Vacated 1989
  • NIOSH Recommended Exposure Limit (REL)
  • Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
  • Target Organs: Eyes, skin, respiratory system, central nervous system, cardiovascular system
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm-3: 0.057
    • Bone/p.p.m: 0.27
    • Liver/p.p.m: 0.7
    • Muscle/p.p.m: 0.05-0.5
    • Daily Dietary Intake: 0.1-0.2 mg
    • Total Mass In Avg. 70kg human: 12-20 mg

Who / Where / When / How

  • Discoverer: Bernard Courtois
  • Discovery Location: Dijon France
  • Discovery Year: 1811
  • Name Origin:
    Greek: iôdes (violet).
  • Abundance of Iodine:
    • Earth's Crust/p.p.m.: 0.14
    • Seawater/p.p.m.:
      • Atlantic Suface: 0.0489
      • Atlantic Deep: 0.056
      • Pacific Surface: 0.043
      • Pacific Deep: 0.058
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): N/A
  • Sources of Iodine:
    Occurs on land and in the sea in sodium and potassium compounds. World production of iodine is around 12,000 tons. Primary producing areas are Chile and Japan.
  • Uses of Iodine:
    Required in small amounts by humans. Once used as an antiseptic, but no longer due to its poisonous nature. Used as a disinfectant, in pharmaceuticals, dyes, catalysts and photography.
  • Additional Notes:

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