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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
nanomaterial aspect ratio/shape
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016
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other: unpublished study report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:
2019
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

Constituent 1
Chemical structure
Reference substance name:
2,9-bis(2-phenylethyl)anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone
EC Number:
266-564-7
EC Name:
2,9-bis(2-phenylethyl)anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H,9H)-tetrone
Cas Number:
67075-37-0
Molecular formula:
C40H26N2O4
IUPAC Name:
7,18-bis(2-phenylethyl)-7,18-diazaheptacyclo[14.6.2.2²,⁵.0³,¹².0⁴,⁹.0¹³,²³.0²⁰,²⁴]hexacosa-1(23),2,4,9,11,13,15,20(24),21,25-decaene-6,8,17,19-tetrone
Test material form:
solid: nanoform

Data gathering

Instruments:
Thermo-Fisher Osiris 200kV
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:
2.2
St. dev.:
1
y Dimension:
1
Remarks on result:
other: median (D50)

Applicant's summary and conclusion

Conclusions:
The particles have a median aspect ratio of 2,2:1.
The shape is “spherical”.
The material is assigned to the “spheroidal” shape category.