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Hydroxides and bases

Ferric hydroxide

Also known as Diiron trioxide hydrate, iron hydroxide (III), iron hydroxide (Fe(OH)3)

CAS 1309-33-7Formula H3FeO3Molar mass 106.87 g/molEC 215-166-1
GHS signal word: Warning. Pictograms: Harmful or irritant 7 suppliers listed
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Ferric hydroxide chemical structure, H3FeO3, CAS 1309-33-7
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Solid
Melting point
500 °C
Density
3.65 @25 °C
HS code
282110
Category
Hydroxides and bases
Illustrative photo, drums, an IBC tote and sacks in a chemical warehouse in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Ferric hydroxide?

Plain description, key identifiers and synonyms

Ferric hydroxide is a chemical substance with the molecular formula H3FeO3 and a molar mass of 106.87 g/mol. Its CAS registry number is 1309-33-7. The IUPAC name is iron(3+) trihydroxide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
iron(3+) trihydroxide
CAS number
1309-33-7 CAS number cross-checked
EC number
215-166-1
Molecular formula
H3FeO3
UNII
2UA751211N
InChIKey
MSNWSDPPULHLDL-UHFFFAOYSA-K
InChI
InChI=1S/Fe.3H2O/h;3*1H2/q+3;;;/p-3
SMILES (canonical and isomeric)
[OH-].[OH-].[OH-].[Fe+3]

Synonyms

  • Diiron trioxide hydrate
  • iron hydroxide (III)
  • iron hydroxide (Fe(OH)3)
  • FeH3O3
  • Ferric hydroxide gel
  • ferric, trihydroxide
  • Iron(III)hydroxide
  • iron (III) hydroxide
  • iron(3+), trihydroxide
  • Hydrated iron sesquioxide

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
500 °Cexp.
Density
3.65 @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
106.87 g/molcalc.
Exact mass
106.9432 Dacalc.
LogP (octanol/water)
-0.53calc.
Topological polar surface area
90 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
4calc.

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

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • 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

Ferric hydroxide suppliers

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

All 7 suppliers
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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

7 suppliers in 4 countries

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Ferric hydroxide 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

Industrial uses: Pigment, Solids separation.

Roles

  • anti-anaemic agent
  • antineoplastic agent
  • pharmaceutical

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 Ferric hydroxide 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 Ferric hydroxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Ferric hydroxide, based on the data on this page

What is Ferric hydroxide?

Ferric hydroxide is a chemical substance with the molecular formula H3FeO3 and a molar mass of 106.87 g/mol. Its CAS registry number is 1309-33-7. The IUPAC name is iron(3+) trihydroxide.

What is the CAS number of Ferric hydroxide?

The CAS registry number of Ferric hydroxide is 1309-33-7.

What is the molecular formula and weight of Ferric hydroxide?

The molecular formula of Ferric hydroxide is H3FeO3 and its molar mass is 106.87 g/mol.

What is Ferric hydroxide used for?

Industrial uses: Pigment, Solids separation.

Is Ferric hydroxide hazardous?

Ferric hydroxide carries the GHS signal word "Warning". 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 Ferric hydroxide?

Ferric hydroxide 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 Ferric hydroxide?

CompoundList lists 7 suppliers of Ferric hydroxide in United States, China, Germany and Finland. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Ferric hydroxide?

Suppliers quote Ferric hydroxide 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 Ferric hydroxide

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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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