Periodic Table of Elements

Element Indium - In

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

Indium's Name in Other Languages

  • Latin: Indium
  • Czech: Indium
  • Croatian: Indij
  • French: Indium
  • German: Indium - s
  • Italian: Indio
  • Norwegian: Indium
  • Portuguese: índio
  • Russian: Индий
  • Spanish: Indio
  • Swedish: Indium

Atomic Structure of Indium

Chemical Properties of Indium

Physical Properties of Indium

  • Atomic Mass Average: 114.818
  • Boiling Point: 2346K 2073°C 3763°F
  • Coefficient of lineal thermal expansion/K-1: 33E-6
  • Conductivity
    Electrical: 0.116 106/cm Ω
    Thermal: 0.816 W/cmK
  • Density: 7.31g/cc @ 300K
  • Description:
    Rare silver-white metal with one of the longest liquid range of all the elements.
  • Elastic Modulus:
    • Rigidity: 3.68/GPa
    • Youngs: 10.6/GPa
  • Enthalpy of Atomization: 242.7 kJ/mole @ 25°C
  • Enthalpy of Fusion: 3.28 kJ/mole
  • Enthalpy of Vaporization: 226.4 kJ/mole
  • Flammablity Class: Non-combustible solid (except as dust)
  • Freezing Point: see melting point
  • Hardness Scale
    • Brinell: 8.83 MN m-2
    • Mohs: 1.2
  • Heat of Vaporization: 231.5kJ/mol
  • Melting Point: 429.91K 156.76°C 314.17°F
  • Molar Volume: 15.73 cm3/mole
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.23J/gK
  • Vapor Pressure = 1.42E+17Pa@156.76°C

Regulatory / Health

  • CAS Number
    • 7440-74-6
  • RTECS: NL1050000
  • OSHA Permissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
  • NIOSH Recommended Exposure Limit (REL)
    • TWA: 0.1 mg/m3
  • Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
  • Target Organs: Eyes, skin, respiratory system, liver, kidneys, heart, blood
  • 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: 0.015
    • Daily Dietary Intake: n/a
    • Total Mass In Avg. 70kg human: 0.4 mg

Who / Where / When / How

  • Discoverer: Ferdinand Reich, Hieronymous Richter
  • Discovery Location: Freiberg Germany
  • Discovery Year: 1863
  • Name Origin:
    From the indigo blue it shows in a spectroscope.
  • Abundance of Indium:
    • Earth's Crust/p.p.m.: 0.049
    • Seawater/p.p.m.: 0.0000001
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 44.7
  • Sources of Indium:
    Found in certain zinc ores and is primarily produced as a by-product of zinc and lead smelting. Around 75 tons are produced each year world wide.
  • Uses of Indium:
    Used to coat high speed bearings, in solar cells, mirrors, regulators in nuclear power, photo cells, transistors and blood & lung research. Also used in low-melting point alloys for safety devices.
  • Additional Notes:

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