Registration Dossier
Registration Dossier
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EC number: 239-763-1 | CAS number: 15680-42-9
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- other: unpublished report
- Title:
- Unnamed
- Year:
- 2 020
- Report date:
- 2020
Materials and methods
- Principles of method if other than guideline:
- Assessment of a potential nanomaterial according to COMMISSION REGULATION (EU) 2018/1881 by Particle Size Analysis
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:
- Image analysis: manual image analysis according to REACH criteria (NanoDefine ParticleSizer)
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:
- [1-[[(2-hydroxyphenyl)imino]methyl]-2-naphtholato(2-)-N,O,O']copper
- EC Number:
- 239-763-1
- EC Name:
- [1-[[(2-hydroxyphenyl)imino]methyl]-2-naphtholato(2-)-N,O,O']copper
- Cas Number:
- 15680-42-9
- Molecular formula:
- C17H11CuNO2
- IUPAC Name:
- [1-[[(2-hydroxyphenyl)imino]methyl]-2-naphtholato(2-)-N,O,O']copper
- Test material form:
- solid: nanoform
- Details on test material:
- - Substance type: pigment
- Physical state: Solid / greenish yellow
- Name of test material (as cited in study report): Irgazin Yellow L 0800
- Lot/batch No.: 0005629903
- Analytical purity: 99.0 %
- Purity test date: 2013
- Expiration date of the lot/batch: unlimited stability under storage conditions
- Stability under test conditions: stable
- Storage condition of test material: room temperature
- Date of manufacture: 01 Dec 2011
Constituent 1
Data gathering
- Instruments:
- Zeiss EM910 100kV
- 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
- Remarks on result:
- other: D50= 2.8:1
Applicant's summary and conclusion
- Conclusions:
- The particles have a median aspect ratio of 2.8:1.
The shape is “spherical”.
The material is assigned to the “spheroidal” shape category.
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