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Oxides and peroxides

Antimony oxide

Also known as Antimony oxide (Sb2O4), Antimony tetroxide, Diantimony tetraoxide

CAS 1327-33-9Formula O4Sb2Molar mass 307.52 g/molEC 215-474-6
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 14 suppliers listed
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Antimony oxide chemical structure, O4Sb2, CAS 1327-33-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1327-33-9
Formula
O4Sb2
Molar mass
307.52 g/mol
EC number
215-474-6
HS code
282580
Category
Oxides and peroxides

What is Antimony oxide?

Plain description, key identifiers and synonyms

Antimony oxide is a chemical substance with the molecular formula O4Sb2 and a molar mass of 307.52 g/mol. Its CAS registry number is 1327-33-9. The IUPAC name is dioxo(oxostibanyloxy)-λ5-stibane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
dioxo(oxostibanyloxy)-λ5-stibane
CAS number
1327-33-9 CAS number cross-checkedOther or deprecated CAS: 1332-81-6
EC numbers
215-474-6, 215-576-0
Molecular formula
O4Sb2
UNII
XB7RVZ5DN5
InChIKey
AHBGXHAWSHTPOM-UHFFFAOYSA-N
InChI
InChI=1S/4O.2Sb
SMILES (canonical and isomeric)
O=[Sb]O[Sb](=O)=O

Synonyms

  • Antimony oxide (Sb2O4)
  • Antimony tetroxide
  • Diantimony tetraoxide
  • Diantimony tetroxide
  • SUN EPOCH NA 5050
  • beta-antimony tetroxide
  • Antimony tetroxide (sb2o4)
  • 1lambda~5~-Distiboxane-1,1,3-trione
  • Antimony antimonate (sb(sbo4))

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
307.52 g/molcalc.
Exact mass
305.7873 Dacalc.
LogP (octanol/water)
-1.19calc.
Topological polar surface area
60.44 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
2calc.
Heavy atoms
6calc.
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
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302 + H332Harmful if swallowed. Harmful if inhaled.
  • H302Harmful if swallowed.
  • H332Harmful if inhaled.
  • H351Suspected of causing cancer.
  • H373May cause damage to organs through prolonged or repeated exposure.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (17)
  • P203Obtain, read and follow all safety instructions before use.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • 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.
  • P301 + P317If swallowed: Get medical help.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P319Get medical help if you feel unwell.
  • P330Rinse mouth.
  • P391Collect spillage.
  • 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

Antimony oxide suppliers

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

All 14 suppliers
14 of 14 offers

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Where suppliers are based

14 suppliers in 7 countries

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Antimony 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

Functional uses

  • Catalyst
  • Flame retardant
  • Surface modifier

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 Antimony oxide is traded under.

HS 2825.80Indicative HS code

Antimony oxides

World exports in 2024
$926M
+44.7% vs 2023, imports $815M
2019 to 2024
Top exporters
  1. China49.1%
  2. Belgium16.0%
  3. France * partner reported11.8%
Top importers
  1. United States27.4%
  2. Italy8.1%
  3. India * partner reported7.4%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Antimony oxide?

Antimony oxide is a chemical substance with the molecular formula O4Sb2 and a molar mass of 307.52 g/mol. Its CAS registry number is 1327-33-9. The IUPAC name is dioxo(oxostibanyloxy)-λ5-stibane.

What is the CAS number of Antimony oxide?

The CAS registry number of Antimony oxide is 1327-33-9. Other or deprecated CAS numbers: 1332-81-6.

What is the molecular formula and weight of Antimony oxide?

The molecular formula of Antimony oxide is O4Sb2 and its molar mass is 307.52 g/mol.

What is Antimony oxide used for?

Known uses and roles of Antimony oxide include catalyst, flame retardant and surface modifier.

Is Antimony oxide hazardous?

Antimony oxide carries the GHS signal word "Warning". Main hazards: harmful if swallowed. harmful if inhaled, harmful if swallowed, harmful if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Antimony oxide?

Antimony oxide is usually classified under HS code 282580 (Antimony oxides). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Antimony oxide?

CompoundList lists 14 suppliers of Antimony oxide in China, United States, Canada, Germany and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Antimony oxide in India?

1 supplier in India list Antimony 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 Antimony oxide?

Suppliers quote Antimony 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 Antimony 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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