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Oxides and peroxides

Indium oxide

Also known as Indium sesquioxide, Diindium trioxide, India

CAS 12672-71-8Formula In2O3Molar mass 277.63 g/molEC 215-193-9
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 31 suppliers listed
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Indium oxide chemical structure, In2O3, CAS 12672-71-8
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Solid
Melting point
1,913 °C
Density
7.18 @25 °C
HS code
282590
Category
Oxides and peroxides
Illustrative photo, closed jumbo bulk bags in a warehouse in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Indium oxide?

Plain description, key identifiers and synonyms

Indium oxide is a chemical substance with the molecular formula In2O3 and a molar mass of 277.63 g/mol. Its CAS registry number is 12672-71-8. The IUPAC name is bis(indium(3+)), tris(oxygen(2-)).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
bis(indium(3+)), tris(oxygen(2-))
CAS number
12672-71-8 CAS number cross-checkedOther or deprecated CAS: 1312-43-2
EC numbers
215-193-9, 235-765-1
Molecular formula
In2O3
UNII
4OO9KME22D
InChIKey
PJXISJQVUVHSOJ-UHFFFAOYSA-N
InChI
InChI=1S/2In.3O/q2*+3;3*-2
SMILES (canonical and isomeric)
[O-2].[O-2].[O-2].[In+3].[In+3]

Synonyms

  • Indium sesquioxide
  • Diindium trioxide
  • India
  • Indium trioxide
  • Indium (III) oxide
  • Indium (3+) oxide
  • indium oxide (In2-O3)
  • Indium(III) oxide
  • Indium oxide (In2O3)
  • In2O3
  • indium(3+), oxygen(2-)
  • Indium(III)oxide
  • Indium(II) oxide
  • Indium(3+) oxide
  • Trioxodiindium
  • Indium oxide (2/3)
  • Indium Oxide Nanoparticle Dispersion
  • Indium (III) Oxide Nanopowder ultrapure

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

Physical form
Solidexp.
Melting point
1,913 °Cexp.
Density
7.18 @25 °Cexp.

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
277.63 g/molcalc.
Exact mass
277.7925 Dacalc.
LogP (octanol/water)
-1.12calc.
Topological polar surface area
85.5 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
5calc.

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

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
  • H372Causes damage to organs through prolonged or repeated exposure.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (19)
  • 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.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • 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.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • 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 oxide suppliers

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

All 31 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

31 suppliers in 9 countries

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Indium oxide price

Indicative price range per kg from live supplier offers

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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

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

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 oxide is traded under.

HS 2825.90Indicative HS code

Inorganic bases not elsewhere classified in heading 2825

World exports in 2024
$972M
+5.4% vs 2023, imports $3.4B
2019 to 2024
Top exporters
  1. China28.5%
  2. United States23.7%
  3. Brazil10.8%
Top importers
  1. South Korea77.2%
  2. Japan4.3%
  3. United States3.8%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Indium oxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Indium oxide?

Indium oxide is a chemical substance with the molecular formula In2O3 and a molar mass of 277.63 g/mol. Its CAS registry number is 12672-71-8. The IUPAC name is bis(indium(3+)), tris(oxygen(2-)).

What is the CAS number of Indium oxide?

The CAS registry number of Indium oxide is 12672-71-8. Other or deprecated CAS numbers: 1312-43-2.

What is the molecular formula and weight of Indium oxide?

The molecular formula of Indium oxide is In2O3 and its molar mass is 277.63 g/mol.

Is Indium oxide hazardous?

Indium oxide carries the GHS signal word "Danger". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Indium oxide?

Indium oxide is usually classified under HS code 282590 (Hydrazine and hydroxylamine and their inorganic salts, other inorganic bases, other…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Indium oxide?

CompoundList lists 31 suppliers of Indium oxide in China, United States, Germany, India and 5 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 oxide in India?

2 suppliers in India list Indium oxide 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 oxide?

Suppliers quote Indium oxide 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 oxide

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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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