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Metals, alloys and elements

Indium

Also known as Indium, elemental, Indium metal, IN

CAS 7440-74-6Formula InMolar mass 114.82 g/molEC 231-180-0
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 82 suppliers listed Drug substance
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
Appearance
Soft, white metal with bluish tinge. Ductile, malleable, softer than lead, leaves a mark…
Melting point
156.6 °C
Boiling point
2,072 °C
Density
7.31 g/cm³ at 20 °C
Solubility
Insoluble in water in bulk form, soluble in most acids.
HS code
811292
Category
Metals, alloys and elements
Illustrative photo, 25 kg kraft paper sacks of white powder in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Indium?

Plain description, key identifiers and synonyms

Indium(1+) is a monoatomic monocation and a monoatomic indium.

Indium is a chemical element with symbol In and atomic number 49.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
indium
CAS number
7440-74-6 CAS number cross-checked
EC number
231-180-0
Molecular formula
In
UNII
045A6V3VFX
MDL number
MFCD00134048
InChIKey
APFVFJFRJDLVQX-UHFFFAOYSA-N
InChI
InChI=1S/In
SMILES (canonical and isomeric)
[In]

Synonyms

  • Indium, elemental
  • Indium metal
  • IN
  • Indium metallicum
  • Headache sore throat
  • indium atom
  • Indium (powder)
  • Indium powder
  • Indium shot
  • Indium powder, -100 mesh
  • indio
  • Indium shot, tear drop, 4mm (0.2in)
  • ICP standard Inidum 2-5% HNO3 1000 microg/mL
  • Indium Standard: In @ 10 microg/mL in 2% HNO3
  • Indium Standard: In @ 1000 microg/mL in 5% HNO3
  • Indium Standard: In @ 10000 microg/mL in 5% HNO3
  • ICP-MS Internal Standard: In @ 100 ug/mL in 2% HNO3
  • Indium Internal Standard: In @ 10 microg/mL in 2% HNO3
  • Indium Standard: In @ 1000 microg/g in Hydrocarbon Oil
  • Indium Standard: In @ 5000 microg/g in Hydrocarbon Oil
  • Indiumhydrid
  • Indium granular
  • Indium pieces
  • Element Indium
  • Element:Indium
Show all 38 synonyms
  • Indium foil
  • Indium ingot
  • Indium wire
  • Atomic Indium
  • Element-In
  • Element:In
  • Indium, pieces
  • Indium (atomic)
  • Indium (element)
  • indium(I) cation
  • In (element)
  • indium(1+) ion
  • In Standard Solution

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Soft, white metal with bluish tinge. Ductile, malleable, softer than lead, leaves a mark on paper, crystalizesexp.
Melting point
156.6 °Cexp.
Boiling point
2,072 °Cexp.
Density
7.31 g/cm³ at 20 °Cexp.
Solubility
Insoluble in water in bulk form, soluble in most acids.exp.
Vapour pressure
1.14 × 10⁻¹⁹ Pa at melting pointexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
114.82 g/molcalc.
Exact mass
114.9039 Dacalc.
LogP (octanol/water)
-0.38calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
1calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H332Harmful if inhaled.
  • H335May cause respiratory irritation.
  • H372Causes damage to organs through prolonged or repeated exposure.
Precautionary statements (21)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Indium suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 82 suppliers
30 of 30 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

82 suppliers in 14 countries

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Indium price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Low-melting alloys, bearings, dental alloys, nuclear reactor control rods, low-pressure lamps, electrical contacts, alkaline dry batteries, phosphors, semiconductors (lasers, photodectors, integrated cirucits, CCDs in infra-red videos cameras), liquid crystal displays.

In bearing alloys, as a thin film on moving surfaces made from other metals. In dental alloys. In semiconductor research. In nuclear reactor control rods (in the form of an Ag-In-Cd alloy).

Automobile bearings, ...

Read more

low-melting brazing and soldering alloys, reactor control rods, electroplated coatings on silver-plated steel aircraft bearings that are tarnish resistant, radiation detector.

More recently, gallium and indium alloys have been incorporated into dental alloys as surface hardening agents for dental restoration.

The more important uses of indium include the incorporation into solders, alloys, semiconductors, optoelectronics, plasma television screens, and, more recently, nanoparticles, nano whiskers, and dots. It is also used in automobile bearings as a hardening agent that improves resistance to corrosion.

Industrial uses: Other.

Consumer uses: Other.

Functional uses

  • Plating agent

Pharmacology

Indium is an element with atomic symbol In, atomic number 49, and atomic weight 114.8, a very soft, silvery-white metal with a brilliant lustre.

How it is made

Indium is recovered from fumes, dusts, slags, residues and alloys from zinc or lead-zinc smelting. The source material itself - a reduction bullion, flue dust, or electrolytic slime intermediate - is leached with sulfuric or hydrochloric acid. Then the solutions are concentrated if necessary, and crude indium is recovered as 99+% metal. This crude indium is then refined to 99.99%, 99.999%, 99.9999%, or higher grades by a variety of conventional chemical and electrochemical processes.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Indium is traded under.

HS 8112.92Indicative HS code

Articles thereof, unwrought, including waste and scrap, powders

Our trade statistics cover HS chapters 25 to 40 (minerals, chemicals, plastics and rubber). This code is in chapter 81, metals, which is not included yet.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Indium is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Indium, based on the data on this page

What is Indium?

Indium(1+) is a monoatomic monocation and a monoatomic indium.

What is the CAS number of Indium?

The CAS registry number of Indium is 7440-74-6.

What is the molecular formula and weight of Indium?

The molecular formula of Indium is In and its molar mass is 114.82 g/mol.

What is Indium used for?

Low-melting alloys, bearings, dental alloys, nuclear reactor control rods, low-pressure lamps, electrical contacts, alkaline dry batteries, phosphors, semiconductors (lasers, photodectors, integrated cirucits, CCDs in infra-red videos cameras), liquid crystal displays.

Is Indium hazardous?

Indium carries the GHS signal word "Danger". Main hazards: harmful if swallowed, harmful in contact with skin, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Indium?

Indium is usually classified under HS code 811292 (Unwrought, waste and scrap, powders). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Indium?

CompoundList lists 82 suppliers of Indium in United States, China, Germany, India and 10 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Indium in India?

4 suppliers in India list Indium on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Indium?

Suppliers quote Indium on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Indium

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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