Periodic Table of Elements

Element Iridium - Ir

Comprehensive data on the chemical element Iridium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Iridium. 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.

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Overview of Iridium

Iridium's Name in Other Languages

  • Latin: Iridium
  • Czech: Iridium
  • Croatian: Iridij
  • French: Iridium
  • German: Iridium - s
  • Italian: Iridio
  • Norwegian: Irdium
  • Portuguese: Irídio
  • Russian: Иридий
  • Spanish: Iridio
  • Swedish: Iridium

Atomic Structure of Iridium

Chemical Properties of Iridium

Physical Properties of Iridium

Regulatory / Health

  • CAS Number
    • 7439-88-5
  • RTECS: 1002594IR
  • OSHA Permissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
    • No limits set by OSHA
  • NIOSH Recommended Exposure Limit (REL)
    • No limits set by NIOSH
  • 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: n/a
    • Bone/p.p.m: n/a
    • Liver/p.p.m: n/a
    • Muscle/p.p.m: 2E-5
    • Daily Dietary Intake: n/a
    • Total Mass In Avg. 70kg human: n/a

Who / Where / When / How

  • Discoverer: S.Tennant
  • Discovery Location: London England
  • Discovery Year: 1803
  • Name Origin:
    Latin: iris, iridis (rainbow).
  • Abundance of Iridium:
    • Earth's Crust/p.p.m.: 0.000003
    • Seawater/p.p.m.: N/A
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 7.1
  • Sources of Iridium:
    Found in gravel deposits with platinum and osmiridium ores. Annual world production is around 3 tons. Canada is the primary mining area for iridium.
  • Uses of Iridium:
    Used with osmium to tip gold pen points, to make crucible and special containers. Used to make alloys used for standard weights and measures, and heat-resistant alloys. Also used incancer irradiation, hypodermic needles, helicopter spark plugs and as hardening agent for platinum.
  • Additional Notes:

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