Element Indium

Indium ElementIt is a chemical element with the symbol In and atomic number 49.
Indium is the softest metal that is not an alkali metal. It is a silvery-white metal that resembles tin in appearance. Element Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust.
Indium has a melting point higher than sodium and gallium, but lower than lithium and tin.

Names and Identifiers

Chemical Formula:In
CAS:7440-74-6
Molecular Weight:114.81800 g/mol
EC Number :231-180-0
MDL Number:MFCD00134048
Color:silvery lustrous gray/ silvery-white
Other Names:n/a
PubChem CID:5359967
IUPAC Name:Indium
Inchl:InChI=1S/In
InChI Key:APFVFJFRJDLVQX-UHFFFAOYSA-N
Canonical SMILES:[In]
ICSC Number:1293

Physical & Chemical Properties

Phase:Solid
Density:7.31 g/cm³
Boiling Point:2345 K ​(2072 °C, ​3762 °F)
Melting Point:429.7485 K ​(156.5985 °C, ​313.8773 °F)
Molecular Formula:In
Flash Point:2072°C
Exact Mass:114.90400
Symbol:Globally Harmonized System of Classification
Signal Word:Warning
Hazard Statements:H302 + H312 + H332-H315-H319-H335
Precautionary Statements:P261-P280-P305 + P351 + P338
Hazard Codes:Xn:Harmful
Risk Phrases:R20/21/22;R36/37/38
Safety Phrases:S9-S16-S36/37/39-S36-S26-S45-S28
RIDADR:UN 3089 4.1/PG 2
WGK Germany:3
RTECS:NL1050000
Packaging Group:III
Hazard Class:8

Indium has 39 known isotopes, ranging in mass number from 97 to 135. Only two isotopes occur naturally as primordial nuclides.

Naturally occurring isotopes

IsotopeMass/DaNatural abundance (atom %)Nuclear spin (I)Magnetic moment (μ/μN)
113In112.904061 (4)4.29 (5)9/25.5289
115In114.903882 (4)95.71 (5)9/25.5408

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
109In108.907154.2 hEC to 109Cd9/25.54
110In109.907171.15 hEC to 110Cd24.37
111In110.905112.8049 dEC to 111Cd9/25.50
112In111.9055314.4 mEC to 112Cd; β to 112Sn12.82
114In114.9049181.198 mEC to 114Cd; β to 114Sn12.82
115In116.9038794.4 x 1014 yβ to 115Sn9/25.541

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