If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
310069
Iron(II,III) oxide
powder, <5 μm, 95%
Synonym(s):
Ferrosoferric oxide, Iron oxide black, Magnetite
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
25 g | Check Cart for Availability | $56.70 |
500 g | Check Cart for Availability | $415.00 |
2.5 kg | Estimated to ship onNovember 11, 2026 | $675.00 |
About This Item
$56.70
Quality Segment
assay
95%
form
powder
composition
Fe₃O₄
reaction suitability
core: iron
particle size
<5 μm
mp
1538 °C (lit.)
density
4.8-5.1 g/mL at 25 °C (lit.)
application(s)
battery manufacturing
catalysts
SMILES string
O=[Fe].O=[Fe]O[Fe]=O
InChI
1S/3Fe.4O
InChI key
SZVJSHCCFOBDDC-UHFFFAOYSA-N
General description
Application
- A starting material to synthesize Ca2Fe2O5 (srebrodolskite) microspheres via a single-stage flame spheroidisation (FS) process.
- A catalyst for reverse water gas shift reactions(RWGS).
1 of 1
This Item | |||
|---|---|---|---|
| description powder, <5 μm, 95% | description 99.99% trace metals basis | description nanopowder, 50-100 nm particle size (SEM), 97% trace metals basis | description 10 nm avg. part. size (TEM), PEG functionalized, 1 mg/mL Fe in H2O, dispersion |
| particle size <5 μm | particle size - | particle size 50-100 nm (SEM) | particle size - |
| assay 95% | assay 99.99% trace metals basis | assay 97% trace metals basis | assay - |
| form powder | form powder | form spherical, nanopowder | form dispersion, nanoparticles |
| mp 1538 °C (lit.) | mp 1538 °C (lit.) | mp 1538 °C (lit.) | mp - |
| density 4.8-5.1 g/mL at 25 °C (lit.) | density 4.8-5.1 g/mL at 25 °C (lit.) | density 4.8-5.1 g/mL at 25 °C (lit.) | density 0.996 g/mL at 25 °C, ~1 g/mL at 25 °C |
| composition Fe₃O₄ | composition Fe₃O₄ | composition - | composition - |
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Storage Class
11 - Combustible Solids
WGK
nwg
Flash Point (°F)
Not applicable
Flash Point (°C)
Not applicable
PPE (personal protective equipment)
dust mask type N95 (US), Eyeshields, Gloves
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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