Registration Dossier
Registration Dossier
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EC number: 268-028-8 | CAS number: 67990-05-0
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:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 020
- Report date:
- 2020
Materials and methods
- Principles of method if other than guideline:
- no guideline followed
- Type of method:
- transmission electron microscopy
Test material
- Reference substance name:
- N-(5-chloro-2-methoxyphenyl)-3-hydroxy-4-[[2-methoxy-5-[(phenylamino)carbonyl]phenyl]azo]naphthalene-2-carboxamide
- EC Number:
- 268-028-8
- EC Name:
- N-(5-chloro-2-methoxyphenyl)-3-hydroxy-4-[[2-methoxy-5-[(phenylamino)carbonyl]phenyl]azo]naphthalene-2-carboxamide
- Cas Number:
- 67990-05-0
- Molecular formula:
- C32H25ClN4O5
- IUPAC Name:
- N-(5-chloro-2-methoxyphenyl)-3-hydroxy-4-[[2-methoxy-5-(phenylcarbamoyl)phenyl]diazenyl]-2-naphthamide
- Test material form:
- solid: nanoform
Constituent 1
Results and discussion
Shape description
- Shape:
- other: polyhedral
- Percentage:
- 100 %
Aspect ratio
- x Dimension:
- >= 1.49 - <= 1.56
- y Dimension:
- 1
- Remarks on result:
- other:
- Remarks:
- We drew the minimum bounding rectangle on each particle of C. I. Pigment Red 269 in the TEM images, measured the width (the short side) and the length (the long side) with MOUNTECH, Mac-View Ver. 4 (herein, treat the width as the length of the shortest dimension, and the length as the length of the longest dimension, respectively), and calculated the length/width ratio as the aspect ratio. Therefore, the range for the x Dimension, given above, represents the average aspect ratio obtained based on measurements of three batches.
Applicant's summary and conclusion
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