Periodic Table of Elements

Element Krypton - Kr

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

Krypton's Name in Other Languages

  • Latin: Krypton
  • Czech: Krypton
  • Croatian: Kripton
  • French: Krypton
  • German: Krypton - r
  • Italian: Cripto
  • Norwegian: Krypton
  • Portuguese: Criptônio
  • Russian: Криптон
  • Spanish: Criptón
  • Swedish: Krypton

Atomic Structure of Krypton

Chemical Properties of Krypton

Physical Properties of Krypton

Regulatory / Health

  • CAS Number
    • 7439-90-9
  • RTECS: OC6772500
  • 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: trace
    • Bone/p.p.m: nil
    • Liver/p.p.m: nil
    • Muscle/p.p.m: nil
    • Daily Dietary Intake: n/a
    • Total Mass In Avg. 70kg human: n/a

Who / Where / When / How

  • Discoverer: Sir William Ramsey, M.W. Travers
  • Discovery Location: London England
  • Discovery Year: 1898
  • Name Origin:
    Greek: kryptos (hidden).
  • Abundance of Krypton:
    • Earth's Crust/p.p.m.: 0.00001
    • Seawater/p.p.m.: 0.00008
    • Atmosphere/p.p.m.: 1.14
    • Sun (Relative to H=1E12): N/A
  • Sources of Krypton:
    Forms 1 millionth of the atmosphere. Obtained from production of liquid air. Around 8 tons of krypton is produced each year world wide.
  • Uses of Krypton:
    Used in fluorescent bulbs, flashbulbs, UV lasers and as a wavelength standard.
  • Additional Notes:
    Although krypton is a harmless gas, it could asphyxiate if it excluded oxygen from the lungs.

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A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

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