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.
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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
700312
Iron oxide(II,III), magnetic nanoparticles solution
10 nm avg. part. size, 5 mg/mL in toluene
Synonym(s):
Magnetic iron oxide nanocrystals, Magnetite, Superparamagnetic iron oxide nanoparticles
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
5 mL | Check Cart for Availability | $345.00 |
About This Item
$345.00
Quality Segment
form
nanoparticles, solution
concentration
5 mg/mL in toluene
magnetization
>45 emu/g (at ambient temperature under 4500 Oe)
avg. part. size
10 nm
particle size
9-11 nm (TEM; conforms)
density
0.865 g/mL at 25 °C
SMILES string
O=[Fe].O=[Fe]O[Fe]=O
InChI
1S/3Fe.4O
InChI key
SZVJSHCCFOBDDC-UHFFFAOYSA-N
General description
It contains <1.0% oleic acid stabilizing ligands.
Application
1 of 1
This Item | |||
|---|---|---|---|
| description 10 nm avg. part. size, 5 mg/mL in toluene | description 10 nm avg. part. size (TEM), PEG functionalized, 1 mg/mL Fe in H2O, dispersion | description 5 nm avg. part. size, 5 mg/mL in toluene | description 20 nm avg. part. size, 5 mg/mL in toluene |
| form nanoparticles, solution | form dispersion, nanoparticles | form nanoparticles, solution | form nanoparticles, solution |
| particle size 9-11 nm (TEM; conforms) | particle size - | particle size 5 nm±1 nm (TEM; conforms) | particle size 20 nm (+/- 2nm TEM) |
| density 0.865 g/mL at 25 °C | density 0.996 g/mL at 25 °C, ~1 g/mL at 25 °C | density 0.865 g/mL at 25 °C | density 0.865 g/mL at 25 °C |
| magnetization >45 emu/g (at ambient temperature under 4500 Oe) | magnetization >45 emu/g, at room temperature; under 4500 Oe | magnetization ≥30 emu/g (at ambient temperature under 4500 Oe) | magnetization >20 emu/g, at room temp. under 4500 Oe |
| Quality Level 100 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
| concentration 5 mg/mL in toluene | concentration 1 mg/mL Fe in H2O | concentration 5 mg/mL in toluene | concentration 5 mg/mL in toluene |
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Signal Word
Danger
Hazard Codes
Precautionary Statements
Hazard Classifications
Aquatic Chronic 3 - Asp. Tox. 1 - Flam. Liq. 2 - Repr. 2 - Skin Irrit. 2 - STOT RE 2 - STOT SE 3
Target Organs
Central nervous system
Storage Class
3 - Flammable liquids
WGK
WGK 3
Flash Point (°F)
45.0 °F
Flash Point (°C)
7.2 °C
PPE (personal protective equipment)
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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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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What is the density of the product ( super paramagnetic iron oxide NP in toluene)
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This product is not tested for density. The final concentration of the solution is 5 mg/mL nanoparticles in toluene. However, the density of the iron oxide nanoparticles is ~5.2 g/cm3. The density of 0.865 g/ml listed on the product page is in reference to the toluene, only.
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What is the coating thickness of oleic acid on product number 700312, 700320, and 700304, Iron oxide(II,III), magnetic nanoparticles solution?
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The suppliers of the magnetic iron oxide nanoparticles in toluene have indicated that the particles are essentially coated with a monolayer of oleic acid. Since the oleic acid is a long chain hydrocarbon there can exist some folding and irregular structure on the surface. The suppliers estimate that one should add 1-2 nm to the particle size due to the presence of the oleic acid coating. From this, 1.5 nm is the closest approximation of coating thickness as provided by our suppliers.
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What is the purpose of the oleic acid in Product 700312, Iron oxide? Can it be removed?
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Per the manufacturer, the oleic acid allows the iron oxide nanoparticles to be soluble in the solvent (i.e. toluene).
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What is the Department of Transportation shipping information for this product?
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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.
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How should a sample of the Iron oxide(II,III), magnetic nanoparticles solution in toluene be prepared for analysis by transmission electron microscopy (TEM)?
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The particle size is determined by TEM.If the solution as provided is not diluted, a superlattice of multilayer nanocrystals will form on the grid, appearing to be an aggregate. The solution can be diluted with the same solvent that it was shipped in (toluene). A solution diluted to 0.1-0.5 mg/mL should be concentrated enough to get a nice picture. One drop per grid should be sufficient. (Since the solution is provided at a concentration of 5 mg/mL, this would be a 10- to 50-fold dilution.)After applying the sample to the grid, a drying time of a minimum of 10-15 minutes is recommended.After performing several successful dilutions and getting good results, the analyst will get a feel for the correct dilution just by judging the color and darkness of the diluted sample. If you see lone isolated dots in the TEM, then your sample is too dilute. If you cannot distinguish separate particles, it is too concentrated. Good record keeping will help to zero in on the best dilution factor for the type of picture that you want.
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What method is used to determine the size of the particles in Product 700312, Iron oxide?
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TEM used to check particle size. Light Scattering or similar methods are not utilized.
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How is the magnetization of Product 700312, Iron oxide, determined?
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Per the supplier, the magnetization is determined by using a Magnetic Susceptibility Balance.
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