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EC number: 271-176-6 | CAS number: 68516-73-4
Nanomaterial aspect ratio / shape
Administrative data
- Endpoint:
- nanomaterial aspect ratio/shape
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2019
- Reliability:
- 2 (reliable with restrictions)
Data source
Reference
- Reference Type:
- other: unpublished study report
- Title:
- Unnamed
- Year:
- 2 019
- Report date:
- 2019
Materials and methods
- Principles of method if other than guideline:
- Method selection according to Gaillard et al., Nanoscale Adv., 2019, 1, 781
TEM image evaluation according to Verleysen et al., Materials 2019, 12, 2274; doi:10.3390/ma12142274 - GLP compliance:
- no
- Type of method:
- transmission electron microscopy
- Details on methods and data evaluation:
- TEM image evaluation according to Verleysen et al., Materials 2019, 12, 2274; doi:10.3390/ma12142274
Sample Preparation: Dispersion in ethanol; transfer to carbon-coated TEM-grids.
Test material
- Reference substance name:
- Tetramethyl 2,2'-[1,4-phenylenebis[imino(1-acetyl-2-oxoethane-1,2-diyl)azo]]bisterephthalate
- EC Number:
- 271-176-6
- EC Name:
- Tetramethyl 2,2'-[1,4-phenylenebis[imino(1-acetyl-2-oxoethane-1,2-diyl)azo]]bisterephthalate
- Cas Number:
- 68516-73-4
- Molecular formula:
- C34H32N6O12
- IUPAC Name:
- tetramethyl 2,2'-{1,4-phenylenebis[imino(1,3-dioxobutane-2,1-diyl)diazene-2,1-diyl]}diterephthalate
- Test material form:
- solid: nanoform
Constituent 1
Data gathering
- Instruments:
- Thermo-Fisher Talos 200kV
Results and discussion
Shape description
- Key result
- Shape:
- spherical
- Remarks on result:
- other: The material is assigned to the “spheroidal” shape category.
Aspect ratio
- Key result
- x Dimension:
- 3
- St. dev.:
- 2.2
- y Dimension:
- 1
- Remarks on result:
- other: median (D50)
Any other information on results incl. tables
The number-based concentration of particles with sizes below 100 nm (smallest feret diameter) is 99%. The median (D50) of the particle size is 34.2 nm.
Applicant's summary and conclusion
- Conclusions:
- - The particles have a median aspect ratio of 3,0:1.
- The material is assigned to the “spheroidal” shape category. The shape is “spherical”.
- The number-based concentration of particles with sizes below 100 nm (smallest feret diameter) is 99%. The median (D50) of the particle size is 34.2 nm.
The material is therefore classified as “nano” according to the definition of nanomaterial 2011/696/EU.
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