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Physical & Chemical properties

Particle size distribution (Granulometry)

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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:
2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(2-methylphenyl)-3-oxobutyramide]
EC Number:
226-789-3
EC Name:
2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(2-methylphenyl)-3-oxobutyramide]
Cas Number:
5468-75-7
Molecular formula:
C34H30Cl2N6O4
IUPAC Name:
2,2'-[(3,3'-dichlorobiphenyl-4,4'-diyl)didiazene-2,1-diyl]bis[N-(2-methylphenyl)-3-oxobutanamide]
Test material form:
solid: nanoform

Results and discussion

Particle sizeopen allclose all
Percentile:
D50
Mean:
4.17 µm
St. dev.:
0.54
Percentile:
D10
Mean:
0.59 µm
St. dev.:
0.05
Percentile:
D90
Mean:
23.84 µm
St. dev.:
5.7

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: 19.63 %

percentage below 15.00 µm: 83.94 %

percentage below 100.00 µm: 98.22 %

percentage below 200.00 µm: 99.50 %

Applicant's summary and conclusion