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EC number: 226-970-7 | CAS number: 5580-57-4
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)
- 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- other: unpublished study report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:
- Image analysis: manual image analysis according to REACH criteria (NanoDefine ParticleSizer)
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
A few mg of the previously wobbled/shaken pigment powder was dispersed in distillated water in an ultrasonic bath. A droplet of the well dispersed and diluted pigment dispersion was transferred to a TEM-grid (Cu) coated with a polymer support film (Formvar®).
Test material
- Reference substance name:
- 3,3'-[(2-chloro-5-methyl-p-phenylene)bis[imino(1-acetyl-2-oxoethylene)azo]]bis[4-chloro-N-(3-chloro-o-tolyl)benzamide]
- EC Number:
- 226-970-7
- EC Name:
- 3,3'-[(2-chloro-5-methyl-p-phenylene)bis[imino(1-acetyl-2-oxoethylene)azo]]bis[4-chloro-N-(3-chloro-o-tolyl)benzamide]
- Cas Number:
- 5580-57-4
- Molecular formula:
- C43H35Cl5N8O6
- IUPAC Name:
- 3,3'-{(2-chloro-5-methyl-1,4-phenylene)bis[imino(1,3-dioxobutane-2,1-diyl)diazene-2,1-diyl]}bis[4-chloro-N-(3-chloro-2-methylphenyl)benzamide]
- Test material form:
- solid: nanoform
Constituent 1
Data gathering
- Instruments:
- TEM: Zeiss EM910 100kV
- Calibration:
- no data
- Reproducibility:
- no data
Results and discussion
Shape description
- Key result
- Shape:
- other: multimodal shapes
- Remarks on result:
- other: The shape is “spherical+elongated”.
Aspect ratio
- Key result
- x Dimension:
- 2.4
- St. dev.:
- 1.6
- y Dimension:
- 1
- Remarks on result:
- other: median (D50)
Applicant's summary and conclusion
- Conclusions:
- The particles have a median aspect ratio of 2,4:1.
The shape is “spherical+elongated”.
The material is assigned to the “multimodal” shape category.
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