MilliporeSigma
All Photos(2)

544884

Sigma-Aldrich

Iron(III) oxide

nanopowder, <50 nm particle size (BET)

Synonym(s):
Ferric oxide
Empirical Formula (Hill Notation):
Fe2O3
CAS Number:
Molecular Weight:
159.69
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

Quality Level

description

crystalline (primarily γ)

form

nanopowder

particle size

<50 nm (BET)

surface area

50-245 m2/g

application(s)

battery manufacturing

SMILES string

O=[Fe]O[Fe]=O

InChI

1S/2Fe.3O

InChI key

JEIPFZHSYJVQDO-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Packaging

5, 25 g in glass bottle

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. What form of iron (III) oxide is Product 544884?

    Both the alpha-form and gamma-form are present in the mineral form naturally. This nanopowder is expected to be comprised of primarily the gamma-form, also known as maghemite.

  5. What is the purity of Iron(III) oxide, Product 544884?

    The purity of this product is not specifically stated on the certificate of analysis. However, an estimated purity can be determined based on the iron content. One mole of iron (III) oxide contains 2 moles (or 111.694g) of iron. The theoretical amount of iron present is approximately 69.94%. Purity can only be measured for a particular lot, which can be calculated based on the iron content determined for that lot. The ratio of the experimental content and the theoretical content, expressed as a percentage will be the purity of the particular lot. For example, an experimental result of 68.6% iron corresponds to a purity of 98.1%.

  6. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  7. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Yangyang Yang et al.
Ecotoxicology and environmental safety, 148, 89-96 (2017-10-17)
The behaviors of nanoparticles rely on the aqueous condition such as natural organic matter (NOM). Therefore the presence of NOM would influence the interaction of nanoparticles with other substances possibly. Here, microcystin-LR (MC-LR) adsorption on iron oxide nanoparticles (IONPs) was
Hokuto Fuse et al.
Nanomaterials (Basel, Switzerland), 9(2) (2019-02-06)
Submicrometre spherical particles made of Au and Fe can be fabricated by pulsed-laser melting in liquid (PLML) using a mixture of Au and iron oxide nanoparticles as the raw particles dispersed in ethanol, although the detailed formation mechanism has not
Daniel Matatagui et al.
Sensors (Basel, Switzerland), 19(24) (2019-12-11)
A portable electronic nose based on surface acoustic wave (SAW) sensors is proposed in this work to detect toxic chemicals, which have a great potential to threaten the surrounding natural environment or adversely affect the health of people. We want
Junho Han et al.
Scientific reports, 9(1), 6130-6130 (2019-04-18)
Recent developments in analytics using infrared spectroscopy have enabled us to identify the adsorption mechanism at interfaces, but such methods are applicable only for simple systems. In this study, the preferential adsorption of phosphate on binary goethite and maghaemite was
Eric T Ahrens et al.
Nature reviews. Immunology, 13(10), 755-763 (2013-09-10)
The increasing complexity of in vivo imaging technologies, coupled with the development of cell therapies, has fuelled a revolution in immune cell tracking in vivo. Powerful magnetic resonance imaging (MRI) methods are now being developed that use iron oxide- and

Articles

Innovative Materials for Glass Ionomer Cements (GICs): Dental Applications

Innovation in dental restorative materials is driven by the need for biocompatible and natural-appearing restoration alternatives. Conventional dental materials like amalgam and composite resins have inherent disadvantages.

Chemical Synthesis of Monodisperse Magnetic Nanoparticles

Magnetic nanoparticles have attracted tremendous attention due to their novel properties and their potential applications in magnetic recording, magnetic energy storage and biomedicine.

Nanofluids for Biomedical Applications

Currently, magnetic nanoparticles (MNPs) are attracting a lot of attention because of the possibility of many novel applications, especially in biomedical research.

Graphene-Based Composites and their Unique Renewable Energy Applications

Graphene is a unique two-dimensional (2D) structure of monolayer carbon atoms packed into a dense honeycomb crystal that has attracted great interest due to its diverse and fascinating properties.

See All

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service