Periodic Table of Elements

Element Hafnium - Hf

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

Hafnium Menu

Overview of Hafnium

Hafnium's Name in Other Languages

  • Latin: Hafnium
  • Czech: Hafnium
  • Croatian: Hafnij
  • French: Hafnium
  • German: Hafnium - s
  • Italian: Afnio
  • Norwegian: Hafnium
  • Portuguese: Háfnio
  • Russian: Гафний
  • Spanish: Hafnio
  • Swedish: Hafnium

Atomic Structure of Hafnium

Chemical Properties of Hafnium

Physical Properties of Hafnium

Regulatory / Health

  • CAS Number
    • 7440-58-6 powder, wet
  • UN/NA ID and ERG Guide Number
    • 1326  / 170 powder, wet
    • 2545  / 135 powder, dry
  • RTECS: MG4600000
  • OSHA Permissible Exposure Limit (PEL)
  • OSHA PEL Vacated 1989
  • NIOSH Recommended Exposure Limit (REL)
  • Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
  • Target Organs: Eyes, skin, mucous membrane , liver
  • 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: n/a
    • Daily Dietary Intake: n/a
    • Total Mass In Avg. 70kg human: n/a

Who / Where / When / How

  • Discoverer: Dirk Coster, Georg C. von Hevesy
  • Discovery Location: Copenhagen Denmark
  • Discovery Year: 1923
  • Name Origin:
    From Hafnia Latin name of Copenhagen.
  • Abundance of Hafnium:
    • Earth's Crust/p.p.m.: 5.3
    • Seawater/p.p.m.: 0.000007
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 6
  • Sources of Hafnium:
    Obtained as a by-product zirconium refining. Around 50 tons are produced world wide annually.
  • Uses of Hafnium:
    Used in reactor control rods because of its ability to absorb neutrons also as a gas scavenger in vacuum tubes.
  • Additional Notes:
    Hafnium is poorly absorbed by the body. As a result poisoning by compounds of hafnium is rare.

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