529311 Sigma-Aldrich

Iron(III) oxide

≥99.995% trace metals basis

Synonym: Ferric oxide



Related Categories 26: Fe, Fe, Iron, Magnetic Materials, Magnetic Precursors,
assay   ≥99.995% trace metals basis
form   powder
Featured Industry   Battery Manufacturing
storage temp.   room temp
SMILES string   O=[Fe]O[Fe]=O
InChI   1S/2Fe.3O


General description

Iron is present in the form of iron(III) oxide in almost all natural sources of water. It is the most common supplement of iron for algae. It is a highly stable n-type semiconductor, and possesses a band gap of 2.0 to 2.2eV. It is widely used in solar photoelectrolysis cells. Self-organized nanoporous iron(III) oxide (haematite) has been prepared. Orientation effects on nearly opaque single crystals of iron(III) oxide have been investigated by laser Raman spectroscopy.


Iron(III) oxide may be used in the preparation of iron(III) oxide-hydrate gels.


5, 25 g in glass bottle

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles


Oxide Semiconductor

At the same time that the 3rd industrial revolution gave rise to the current 4th industrial revolution of information and communication technology, display technology rapidly developed from cathode-r...
Keywords: Combustion, Condensations, Dehydration reaction, Deposition, Diffraction, Dihydroxylations, Environmental, Exothermic, Gravimetric analysis, Infrared spectroscopy, Nucleic acid annealing, Oxidations, Plasma polymerization, Polymerization reactions, Positron Emission Tomography, Semiconductor, Solvents

Soft Magnetic Nanocrystalline Alloys: Materials and Models

Victorino Franco Departamento de Física de la Materia Condensada, ICMSE-CSIC Universidad de Sevilla, P.O. Box 1065, 41080, Sevilla, Spain Email:
Victorino Franco
Material Matters, 2016, 11.4
Keywords: Addition reactions, Crystallization, High performance liquid chromatography, Mass spectrometry, Nucleic acid annealing, Precipitation, Spectroscopy, transformation

Surface-enhanced Solar Energy Conversion Systems Using Gold and Silver Nanoparticles

Sustainable, environment-friendly, and clean energy sources with sufficiently high production efficiency for practical application are highly desirable to meet the energy challenge of the 21st centur...
Shanlin Pan and Arunava Gupta
Material Matters, 2012 v7, n4
Keywords: Absorption, Catalysis, Chemical vapor deposition, Degradations, Deposition, Diffusion, Electronics, Organic electronics, Photovoltaics, Recombination, Renewable energy, Semiconductor, Separation, Solar cells

Vistas in Current Magnetic Materials Research

Magnetism and magnetic materials have been of scientific interest for over 1,000 years. More recently, fundamental investigations have focused on exploring the various types of magnetic materials and...
Keywords: Automotive, Ceramics, Detection methods, Electronics, Materials Science, Nanomaterials, Precipitation, Semiconductor

Peer-Reviewed Papers


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