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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
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other: unpublished study report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:
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:
other:
Details on methods and data evaluation:
TEM image evaluation according to Verleysen et al., Materials 2019, 12, 2274; doi:10.3390/ma12142274
TEM: Intertek
Specimen 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

1
Chemical structure
Reference substance name:
Polychloro copper phthalocyanine
EC Number:
215-524-7
EC Name:
Polychloro copper phthalocyanine
Cas Number:
1328-53-6
Molecular formula:
C32HxClyCuN8
IUPAC Name:
[1,2,3,4,8,9,10,11,15,16,17,18,22,23,25-pentadecachloro-5,26-dihydro-29H,31H-phthalocyaninato(2-)-kappa~2~N~29~,N~31~]copper
Details on test material:
- Name of test material (as cited in study report): Pigment Green 7
- Analytical purity: ca.99%
- Lot/batch No.: 120006P050

Data gathering

Instruments:
TEM - EM910 from Zeiss, e-beam acceleration voltage: 100 keV

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:
1.3
St. dev.:
0.3
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 98%. The median (D50) of the particle size is 38,1 nm.

The material is therefore classified as “nano” according to the definition of nanomaterial 2011/696/EU.

Applicant's summary and conclusion

Conclusions:
The particles have a median aspect ratio of 1,3:1.
The shape is “spherical”.
The material is assigned to the “spheroidal” shape category.
The number-based concentration of particles with sizes below 100 nm (smallest feret diameter) is 98%. The median (D50) of the particle size is 38,1 nm.
The material is therefore classified as “nano” according to the definition of nanomaterial 2011/696/EU.