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Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions
Remarks:
Laser diffraction is the well experienced standard procedure for pigments to determine particle size distribution of the substance as it is manufactured and delivered.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2020
Report date:
2020

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

1
Chemical structure
Reference substance name:
2,9-dichloro-5,12-dihydroquino[2,3-b]acridine-7,14-dione
EC Number:
221-424-4
EC Name:
2,9-dichloro-5,12-dihydroquino[2,3-b]acridine-7,14-dione
Cas Number:
3089-17-6
Molecular formula:
C20H10Cl2N2O2
IUPAC Name:
2,9-dichloro-5,12-dihydroquino[2,3-b]acridine-7,14-dione
Test material form:
solid: nanoform

Results and discussion

Particle sizeopen allclose all
Percentile:
D50
Mean:
2.94 µm
St. dev.:
0.38
Percentile:
D10
Mean:
0.66 µm
St. dev.:
0.05
Percentile:
D90
Mean:
14.86 µm
St. dev.:
3.5

Any other information on results incl. tables

Given standard deviation is based on the general experience with pigments and the method. The estimated values are typical standard deviations:

D10: 4 % of D10 (minimum value 0.05 µm)

D50: 13 % of D50 (minimum value 0.1 µm)

D90: 29 % of D90 - D50

percentage below 0.10 µm: 0.00 %

percentage below 1.00 µm: 18.20 %

percentage below 15.00 µm: 90.08 %

percentage below 100.00 µm: 98.63 %

percentage below 200.00 µm: 99.73 %

Applicant's summary and conclusion