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544884

Sigma-Aldrich

Iron(III) oxide

nanopowder, <50 nm particle size (BET)

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Synonym(s):
Ferric oxide
Empirical Formula (Hill Notation):
Fe2O3
CAS Number:
Molecular Weight:
159.69
EC Number:
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.23

description

crystalline (primarily γ)

Quality Level

form

nanopowder

surface area

50-245 m2/g

particle size

<50 nm (BET)

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(III) oxide nanopowder is a fine powder with a particle size of less than 50 nm. It is a red or black solid compound made up of iron and oxygen. It is also known as hematite or ferric oxide. It is a naturally occurring mineral that can also be synthesized in the laboratory. Iron(III) oxide has a number of useful physical properties. It has a high refractive index and is opaque, making it useful as a pigment in paints in inks. Iron(III) oxide is also catalytically active and weakly ferromagnetic at room temperature.

Application

Iron(III) oxide nanopowder has a number of uses due to its magnetic and catalytic properties. It is used in the production of magnetic recording media such as magnetic tapes and disks. It is also used as a catalyst in the production of chemicals, including the production of gasoline and plastics and in environmental remediation.

Features and Benefits

  • High theoretical specific capacity
  • Biocompatibility
  • Ease of coating and modification
  • Non-toxicity

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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  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.

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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
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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
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Journal of biomedical nanotechnology, 9(9), 1556-1569 (2013-08-29)
Magnetic nanoparticles have emerged as important players in current research in modern medicine since they can be used in medicine for diagnosis and/or therapeutic treatment of diseases. Among many therapeutic applications of iron-based nanoparticles, drug delivery and photothermal therapy are

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