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Iron(III) Oxide Monohydrate, Yellow

CAS #:

Linear Formula:

Fe2O3• H2O

MDL Number:


EC No.:



(2N) 99% Iron(III) Oxide Monohydrate
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(3N) 99.9% Iron(III) Oxide Monohydrate
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(4N) 99.99% Iron(III) Oxide Monohydrate
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(5N) 99.999% Iron(III) Oxide Monohydrate
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Iron(III) Oxide Monohydrate, Yellow Properties (Theoretical)

Compound Formula Fe2H2O4
Molecular Weight 171.71
Appearance Yellow powder
Melting Point >1000 °C
Boiling Point N/A
Density 2.44-3.60 g/cm3
Solubility in H2O N/A
Exact Mass 177.865 g/mol
Monoisotopic Mass 177.865 g/mol

Iron(III) Oxide Monohydrate, Yellow Health & Safety Information

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Precautionary Statements P262-P280-P305+P351+P338-P304+P340-P403+P233-P501
Flash Point Not applicable
Transport Information NONH for all modes of transport

About Iron(III) Oxide Monohydrate, Yellow

Oxide IonIron(III) Oxide Monohydrate (Yellow) is a highly insoluble thermally stable Iron source suitable for glass, optic and ceramic applications. Oxide compounds are not conductive to electricity. However, certain perovskite structured oxides are electronically conductive finding application in the cathode of solid oxide fuel cells and oxygen generation systems. They are compounds containing at least one oxygen anion and one metallic cation. They are typically insoluble in aqueous solutions (water) and extremely stable making them useful in ceramic structures as simple as producing clay bowls to advanced electronics and in light weight structural components in aerospace and electrochemical applications such as fuel cells in which they exhibit ionic conductivity. Metal oxide compounds are basic High Purity (99.999%) Iron(III) Oxide (FeO) Powderanhydrides and can therefore react with acids and with strong reducing agents in redox reactions. Iron(III) Oxide is also available in pellets, pieces, powder, sputtering targets, tablets, and nanopowder (from American Elements' nanoscale production facilities). Iron(III) Oxide Monohydrate is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. Additional technical, research and safety (SDS) information is available.

Iron(III) Oxide Monohydrate, Yellow Synonyms

Ferric oxide hydrate, micronised yellow iron oxide, Pigment Yellow 42, Compound ferric green 5606, Bayferrox 920, CAS 12259-21-1, diferric oxide hydrate, Iron hydroxide oxide yellow

Chemical Identifiers

Linear Formula Fe2O3• H2O
MDL Number MFCD00149717
EC No. 257-098-5
Pubchem CID 61560
IUPAC Name iron(3+); oxygen(2-); hydrate
SMILES O.[O-2].[O-2].[O-2].[Fe+3].[Fe+3]
InchI Identifier InChI=1S/2Fe.H2O.3O/h;;1H2;;;/q2*+3;;3*-2

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements

See more Iron products. Iron (atomic symbol: Fe, atomic number: 26) is a Block D, Group 8, Period 4 element with an atomic weight of 55.845. The number of electrons in each of Iron's shells is 2, 8, 14, 2 and its electron configuration is [Ar] 3d6 4s2. Iron Bohr ModelThe iron atom has a radius of 126 pm and a Van der Waals radius of 194 pm. Iron was discovered by humans before 5000 BC. In its elemental form, iron has a lustrous grayish metallic appearance. Iron is the fourth most common element in the Earth's crust and the most common element by mass forming the earth as a whole. Iron is rarely found as a free element, since it tends to oxidize easily; it is usually found in minerals such as magnetite, hematite, goethite, limonite, or siderite.Elemental Iron Though pure iron is typically soft, the addition of carbon creates the alloy known as steel, which is significantly stronger.

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