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Oxides and peroxides

Wustite

Also known as Wuestite, Iozite, oxoiron

CAS 17125-56-3Formula FeOMolar mass 71.84 g/molEC 215-721-8
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Wustite chemical structure, FeO, CAS 17125-56-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
17125-56-3
Formula
FeO
Molar mass
71.84 g/mol
EC number
215-721-8
HS code
282110
Category
Oxides and peroxides

What is Wustite?

Plain description, key identifiers and synonyms

Ferrous oxide is an iron oxide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
oxoiron
CAS number
17125-56-3Other or deprecated CAS: 1201813-70-8, 12134-66-6, 1317-60-8, 1345-25-1, 160300-82-3
EC number
215-721-8
Molecular formula
FeO
UNII
G7036X8B5H
InChIKey
UQSXHKLRYXJYBZ-UHFFFAOYSA-N
InChI
InChI=1S/Fe.O
SMILES (canonical and isomeric)
O=[Fe]

Synonyms

  • Wuestite
  • Iozite
  • oxoiron
  • Iron(ii)oxide
  • Eisenoxydul
  • iron-oxygen
  • Eisen(II)-oxid
  • Iron(2) oxide
  • Iron(II) oxide, CP
  • iron oxide ferrous oxide iron(II) oxide eisen(II)-oxid
  • Iron(II) oxide, -10 mesh, 99.8% trace metals basis

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
71.84 g/molcalc.
Exact mass
71.9299 Dacalc.
LogP (octanol/water)
-0.12calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
2calc.
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

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.

Wustite suppliers

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Wustite price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2821.10Indicative HS code

Iron oxides and hydroxides

World exports in 2024
$669M
+0.0% vs 2023, imports $910M
2019 to 2024
Top exporters
  1. China48.4%
  2. United States7.3%
  3. Italy5.5%
Top importers
  1. United States27.1%
  2. China8.9%
  3. United Kingdom3.8%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Wustite?

Ferrous oxide is an iron oxide.

What is the CAS number of Wustite?

The CAS registry number of Wustite is 17125-56-3. Other or deprecated CAS numbers: 1201813-70-8, 12134-66-6, 1317-60-8.

What is the molecular formula and weight of Wustite?

The molecular formula of Wustite is FeO and its molar mass is 71.84 g/mol.

What is Wustite used for?

Known uses and roles of Wustite include trace minerals in animal feed and nutrition.

Is Wustite hazardous?

No GHS hazard classification for Wustite 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 Wustite?

Wustite is usually classified under HS code 282110 (Iron oxides and hydroxides). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Wustite?

Post a free request on CompoundList and suppliers of Wustite will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Wustite?

Suppliers quote Wustite 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 Wustite

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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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