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Oxides and peroxides

Bismuth oxide

Also known as Bismuth Yellow, Bismuthous oxide, Bismuthum oxydatum

CAS 12640-40-3Formula Bi2O3Molar mass 465.96 g/molEC 215-134-7
50 suppliers listed Drug substance
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Bismuth oxide chemical structure, Bi2O3, CAS 12640-40-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
12640-40-3
Formula
Bi2O3
Molar mass
465.96 g/mol
EC number
215-134-7
HS code
282590
Category
Oxides and peroxides

What is Bismuth oxide?

Plain description, key identifiers and synonyms

Bismuth oxide is a chemical substance with the molecular formula Bi2O3 and a molar mass of 465.96 g/mol. Its CAS registry number is 12640-40-3. The IUPAC name is dibismuth, tris(oxygen(2-)).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
dibismuth, tris(oxygen(2-))
CAS number
12640-40-3 CAS number cross-checkedOther or deprecated CAS: 12048-50-9, 1304-76-3, 171869-78-6
EC numbers
215-134-7, 235-736-3
Molecular formula
Bi2O3
UNII
562M28283M, A6I4E79QF1
InChIKey
TYIXMATWDRGMPF-UHFFFAOYSA-N
InChI
InChI=1S/2Bi.3O/q2*+3;3*-2
SMILES (canonical and isomeric)
[O-2].[O-2].[O-2].[Bi+3].[Bi+3]

Synonyms

  • Bismuth Yellow
  • Bismuthous oxide
  • Bismuthum oxydatum
  • Bismuth trioxide
  • dibismuth, oxygen(2-)
  • Bismuth oxide (BiO2)
  • Bismuth (III) oxide
  • Bismuth oxide powder (1~20 micron)
  • Bismuth oxide nanopowder (<200 nm)

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
465.96 g/molcalc.
Exact mass
465.9455 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

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Bismuth oxide suppliers

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Where suppliers are based

50 suppliers in 15 countries

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Bismuth oxide 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

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

Health and food

  • Active ingredient in FDA approved drug labels

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Bismuth 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 Bismuth oxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Bismuth oxide?

Bismuth oxide is a chemical substance with the molecular formula Bi2O3 and a molar mass of 465.96 g/mol. Its CAS registry number is 12640-40-3. The IUPAC name is dibismuth, tris(oxygen(2-)).

What is the CAS number of Bismuth oxide?

The CAS registry number of Bismuth oxide is 12640-40-3. Other or deprecated CAS numbers: 12048-50-9, 1304-76-3, 171869-78-6.

What is the molecular formula and weight of Bismuth oxide?

The molecular formula of Bismuth oxide is Bi2O3 and its molar mass is 465.96 g/mol.

Is Bismuth oxide hazardous?

No GHS hazard classification for Bismuth oxide is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Bismuth oxide?

Bismuth 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 Bismuth oxide?

CompoundList lists 50 suppliers of Bismuth oxide in India, China, United States, Spain and 11 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Bismuth oxide in India?

12 suppliers in India list Bismuth 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 Bismuth oxide?

Suppliers quote Bismuth 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 Bismuth 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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