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Registration Dossier
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EC number: 221-423-9 | CAS number: 3089-16-5
Nanomaterial aspect ratio / shape
Administrative data
- Endpoint:
- nanomaterial aspect ratio/shape
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2020
- 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- other: unpublished study report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:
- 2 020
- Report date:
- 2020
Materials and methods
- Principles of method if other than guideline:
- Guidelines from NanoDefine are applied:
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:
- Sample Preparation: Dispersion in ethanol; transfer to carbon-coated TEM-grids.
Test material
- Reference substance name:
- 4,11-dichloro-5,12-dihydroquino[2,3-b]acridine-7,14-dione
- EC Number:
- 221-423-9
- EC Name:
- 4,11-dichloro-5,12-dihydroquino[2,3-b]acridine-7,14-dione
- Cas Number:
- 3089-16-5
- Molecular formula:
- C20H10Cl2N2O2
- IUPAC Name:
- 4,11-dichloro-5,12-dihydroquino[2,3-b]acridine-7,14-dione
- Test material form:
- solid: nanoform
- Details on test material:
- - Name of test material (as cited in study report): 4,11-Dichloroquinacridon
- Analytical purity: 98.4% (w/w)
- Lot/batch No.: 200389
Constituent 1
Data gathering
- Instruments:
- Thermo-Fisher Osiris 200 kV
- Calibration:
- no data
- Reproducibility:
- no data
Results and discussion
Shape description
- Key result
- Shape:
- other: orthorhombic
- Remarks on result:
- other: The material is assigned to the “multimodal” shape category.
Aspect ratio
- Key result
- x Dimension:
- 1.8
- St. dev.:
- 1.7
- 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 43,3 nm.
Applicant's summary and conclusion
- Conclusions:
- - The particles have a median aspect ratio of 1,8:1
- The shape is “orthorhombic”. The material is assigned to the “multimodal” shape category.
- The number-based concentration of particles with sizes below 100 nm (smallest feret diameter) is 99%. The median (D50) of the particle size is 43,3 nm.
The material is therefore classified as “nano” according to the definition of nanomaterial 2011/696/EU.
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