A Magnetic Susceptibility Balance is used to determine the magnetic properties of this product.
700304
Iron oxide(II,III), magnetic nanoparticles solution
20 nm avg. part. size, 5 mg/mL in toluene
Synonym(s):
Magnetic iron oxide nanocrystals, Magnetite, Superparamagnetic iron oxide nanoparticles
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5 ML
$246.00
About This Item
Empirical Formula (Hill Notation):
Fe3O4
CAS Number:
Molecular Weight:
231.53
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.23
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form
nanoparticles
solution
Quality Level
concentration
5 mg/mL in toluene
magnetization
>20 emu/g, at room temp. under 4500 Oe
avg. part. size
20 nm
particle size
20 nm (+/- 2nm TEM)
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
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1 of 4
This Item | 700320 | 790508 | 747319 |
|---|---|---|---|
| particle size 20 nm (+/- 2nm TEM) | particle size 5 nm±1 nm (TEM; conforms) | particle size - | particle size - |
| form nanoparticles, solution | form nanoparticles, solution | form dispersion, nanoparticles | form dispersion, nanoparticles |
| density 0.865 g/mL at 25 °C | density 0.865 g/mL at 25 °C | density 0.995 g/mL at 25 °C, ~1 g/mL at 25 °C | density 0.996 g/mL at 25 °C, ~1 g/mL at 25 °C |
| concentration 5 mg/mL in toluene | concentration 5 mg/mL in toluene | concentration 1 mg/mL Fe in H2O | concentration 1 mg/mL Fe in H2O |
| magnetization >20 emu/g, at room temp. under 4500 Oe | magnetization ≥30 emu/g (at ambient temperature under 4500 Oe) | magnetization >25 emu/g (at room temperature; under 4500 Oe) | magnetization >45 emu/g, at room temperature; under 4500 Oe |
| avg. part. size 20 nm | avg. part. size 5 nm | avg. part. size 5 nm (TEM) | avg. part. size 10 nm (TEM) |
General description
Concentration 5mg/ml includes total weight nanocrystals plus ligands.
signalword
Danger
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, Respiratory system
Storage Class
3 - Flammable liquids
wgk_germany
WGK 3
flash_point_f
45.0 °F
flash_point_c
7.2 °C
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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What method is used to determine the magnetization of Product 700304, Iron oxide, magnetic nanoparticles?
1 answer-
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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?
1 answer-
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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How should a sample of the Iron oxide(II,III), magnetic nanoparticles solution in toluene be prepared for analysis by transmission electron microscopy (TEM)?
1 answer-
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 is the Department of Transportation shipping information for this product?
1 answer-
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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When using Product 700304, Iron oxide, magnetic, is it common to see particulates settle on the bottom of the bottle or would this indicate a quality problem?
1 answer-
Occasionally a precipitate will form in concentrated samples, but at the 5mg/ml concentration, there should be little, if any, particulate.
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