• USA Home
  • 747408 - Iron oxide(II,III), magnetic nanoparticles solution

747408 Sigma-Aldrich

Iron oxide(II,III), magnetic nanoparticles solution

30 nm avg. part. size (TEM), PEG functionalized, dispersion, 1 mg/mL Fe in H2O

Synonym: Fe NP PEG, FexOy, Magnetic iron oxide nanocrystals, Magnetite, Superparamagnetic iron oxide nanoparticles

  • CAS Number 1317-61-9

  • Empirical Formula (Hill Notation) Fe3O4

  • Molecular Weight 231.53

  •  MDL number MFCD00011010

  •  PubChem Substance ID 329765832

  •  NACRES NA.23



Related Categories 26: Fe, Biomedical Materials, Iron Oxide Nanoparticles, Materials Science, Nanomaterials,
form   dispersion
concentration   1 mg/mL Fe in H2O
magnetization   >45 emu/g (at room temperature; under 4500 Oe)
color   black
avg. part. size   30 nm (TEM)
density   0.988 g/mL at 25 °C
  ~1 g/mL at 25 °C
functional group   PEG
storage temp.   2-8°C
SMILES string   O=[Fe].O=[Fe]O[Fe]=O
InChI   1S/3Fe.4O


General description

Concentration 5mg/ml includes total weight nanocrystals plus ligands.


These magnetic nanoparticles are typically used in imaging or as contrast agents. The surface functionality allows for different ligation or further functionalization.

Do not freeze.

Legal Information

Product of Supplier: OCEAN NANOTECH LLC

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
>230 °F
Flash Point(C) 
>110 °C


Certificate of Analysis (COA)

Please Enter a Lot Number

Certificate of Origin (COO)

Please Enter a Lot Number
Protocols & Articles


Iron Oxide Nanoparticles, Characteristics and Applications

Iron oxides are common natural compounds and can also easily be synthesized in the laboratory. There are 16 iron oxides, including oxides, hydroxides, and oxide-hydroxides. These minerals are a resul...
Alice Bu
Partner and Operations Manager, Ocean NanoTech LLC
Keywords: Bacterial conjugations, Cancer, Ligands, Magnetic resonance imaging

Magnetic Nanoparticles for Cancer Theranostics

Saumya Nigam,1 Lina Pradhan,2 and D. Bahadur*3 1IITB-Monash Research Academy, IIT Bombay, Powai, Mumbai, India 2Centre for Research in Nanotechnology & Science IIT Bombay, Powai, Mumbai, India 3Depar...
Keywords: Apoptosis, Bacterial conjugations, Cancer, Diagnostic, Magnetic resonance imaging, Materials Science, Nanomaterials, Nanotechnology, Reductions

Micro- and Nanofabricated Biomaterials for the Study of Cells and Microtissues

Phin Peng Lee, Karen E. Samy, Miquella G. Chavez, Alec Cerchiari, Tejal A. Desai* Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, CA 9415...
Keywords: Absorption, Adhesion, Amplification, Apoptosis, Biomaterials, Cancer, Cell culture, Cell proliferation, Diffusion, Immobilization, Indicators, Infrared spectroscopy, Ligands, Magnetic resonance imaging, Materials Science, Microscopy, Molecular biology, Nanotechnology, Semiconductor, Solvents

Peer-Reviewed Papers


Related Products

Technical Service:

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

Bulk Ordering & Pricing:

Need larger quantities for your development, manufacturing or research applications?