Iron(II,III) Oxide Nanopowder Fe3O4 
Formula Fe3O4
Purity 99%
Particle Size 60 nm
SSA 55 m2/g
Morphology spherical
Bulk Density 0.84 g/cm3
True Density 5.24 g/cm3
Appearance Black
CAS Number 1317-61-9
Molecular Weight 231.53


When discussing iron oxide nanopowders, it’s important to note the distinction between two similar but different materials: Fe2O3 and Fe3O4. Both are regularly referred to as iron oxide, but each possesses unique properties and applications, though there’s also significant overlap in their traits, industrial usage, etc.
Fe2O3 nanopowders are red or reddish-brown and composed of particles between 20 and 40nm, available in alpha and gamma variations.
Fe3O4 nanopowders are black and composed available in superparamagnetic variants.



1Ferrofluids: Like many ferrous nanomaterials, the various forms of iron oxide nanopowder are of particular use in the production of ferrofluids and magnetically active fluids for a variety of applications.

2Coatings: The unique blend of traits inherent to the different iron oxide nanopowders make them ideal as ingredients in certain coatings, such as magnetic coatings and coatings designed to absorb EM-waves.

3Magnetic recording: Like many magnetically active nanomaterials, iron oxide nanopowders have been extensively researched and applied in data storage, particularly high-density magnetic recording.

4-Magnetic detection: The nature of iron oxides make them ideal nanoparticles for the manufacture of magnetic detection devices, particularly those dealing in subtler detection than typical materials could easily manage.

5-Microwaves: Various high-tech microwave devices utilize iron oxide nanopowders in their construction and operation.

6-Various magneto-optical applications: In addition to the applications already mentioned, iron oxide nanoparticles play crucial rules in dozens of other magnetic devices and applications, such as magnetically controlled drug delivery, medical imaging, cell separation, and refrigeration.

7-Purification: Iron oxide nanoparticles have a variety of purification-related applications, particularly in biological and waste water contexts.