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EC number: 221-264-5 | CAS number: 3049-71-6
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)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable 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- other: unpublished study report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
- 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:
- 2,9-bis[4-(phenylazo)phenyl]anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone
- EC Number:
- 221-264-5
- EC Name:
- 2,9-bis[4-(phenylazo)phenyl]anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone
- Cas Number:
- 3049-71-6
- Molecular formula:
- C48H26N6O4
- IUPAC Name:
- 2,9-bis[4-(phenyldiazenyl)phenyl]isoquino[4',5',6':6,5,10]anthra[2,1,9-def]isoquinoline-1,3,8,10(2H,9H)-tetrone
- Test material form:
- solid: nanoform
Constituent 1
Data gathering
- Instruments:
- Philips CM120 120kV
- Calibration:
- no data
- Reproducibility:
- no data
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:
- 1.8
- St. dev.:
- 0.9
- 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 79%. The median (D50) of the particle size is 59,4 nm.
The material is therefore classified as “nano” according to the definition of nanomaterial 2011/696/EU.
Applicant's summary and conclusion
- Conclusions:
- The particles have a median aspect ratio of 1,8:1.
The shape is “spherical”.
The material is assigned to the “spheroidal” shape category.
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