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529311

Sigma-Aldrich

Iron(III) oxide

≥99.995% trace metals basis

Synonym(s):

Ferric oxide

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About This Item

Empirical Formula (Hill Notation):
Fe2O3
CAS Number:
1309-37-1
Molecular Weight:
159.69
EC Number:
215-168-2
MDL number:
MFCD00011008
UNSPSC Code:
12352303
PubChem Substance ID:
24877672
NACRES:
NA.23
Pricing and availability is not currently available.

Quality Level

100

Assay

≥99.995% trace metals basis

form

powder

application(s)

battery manufacturing

SMILES string

O=[Fe]O[Fe]=O

InChI

1S/2Fe.3O

InChI key

JEIPFZHSYJVQDO-UHFFFAOYSA-N

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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.[1] It is a highly stable n-type semiconductor, and possesses a band gap of 2.0 to 2.2eV.[2][3] It is widely used in solar photoelectrolysis cells.[3] Self-organized nanoporous iron(III) oxide (haematite) has been prepared.[4] Orientation effects on nearly opaque single crystals of iron(III) oxide have been investigated by laser Raman spectroscopy.[5]

Application

Iron(III) oxide may be used in the preparation of iron(III) oxide-hydrate gels.[6]

Storage Class Code

13 - Non Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000408720
0000364935
MKCV5885
0000364935
MKCV8420

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Iron oxide powder, max. particle size 50 micron, weight 200 g, purity 99.9%

GF41696781

Iron oxide

Iron(II,III) oxide powder, <5 μm, 95%

Sigma-Aldrich

310069

Iron(II,III) oxide

Iron(II,III) oxide nanopowder, 50-100 nm particle size (SEM), 97% trace metals basis

Sigma-Aldrich

637106

Iron(II,III) oxide

The structure of iron (III) oxide-hydrate gels.
Van der Giessen AA.
J. Inorg. Nucl. Chem., 28(10), 2155-2159 (1966)
William B Ingler et al.
Journal of the American Chemical Society, 126(33), 10238-10239 (2004-08-19)
Stable zinc-doped iron(III) oxide thin films that exhibit p-type behavior were synthesized by spray pyrolytic deposition (SPD) on conducting indium-doped tin oxide-coated glass substrate. The highest photocurrent density of 1.1 mA/cm2 was observed at an illumination intensity of 40 mW/cm2
Synthesis and photoelectrochemical properties of nanoporous iron (III) oxide by potentiostatic anodization.
Prakasam HE, et al.
Nanotechnology, 17(17), 4285-4285 (2006)
The single-crystal Raman spectra of nearly opaque materials. Iron (III) oxide and chromium (III) oxide.
Beattie IR and Gilson TR.
J. Chem. Soc. Sect. A, 980-986 (1970)
Light-induced reduction of natural iron (III) oxide and its relevance to phytoplankton.
Finden DAS, et al.
Nature, 309, 783-784 (1984)
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Questions

  1. Do you know what is the size of this Fe2O3 powder with > 99.995% trace metal basis?

    1 answer

    1. Unfortunately, the particle size of this product has not been determined.
      Please see the links below to review other Iron)III) Oxide product options that do offer a particle size.

      310050, Iron(III) Oxide, <5 um
      https://www.sigmaaldrich.com/product/sigald/310050

      544884, Iron(III) Oxide, <50 nm
      https://www.sigmaaldrich.com/US/en/product/aldrich/544884

      720712, Iron(III) Oxide, dispersion, <110 nm, 15% in EtOH
      https://www.sigmaaldrich.com/US/en/product/aldrich/720712

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