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Diss Factsheets

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:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Laser diffraction is the well experienced standard procedure for pigments and other solids to determine particle size distribution of the substance as it is manufactured.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report date:
2016

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: ISO 13320-1
Principles of method if other than guideline:
Laser diffraction particle sizing
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
Trisodium trihydrogen 5,5',5''-(1,3,5-triazine-2,4,6-triyltriimino)tris[5-sulphonatosalicylate]
EC Number:
279-091-6
EC Name:
Trisodium trihydrogen 5,5',5''-(1,3,5-triazine-2,4,6-triyltriimino)tris[5-sulphonatosalicylate]
Cas Number:
79135-90-3
Molecular formula:
C24H18N6O18S3.3Na
IUPAC Name:
trisodium 3-({4,6-bis[(3-carboxy-2-hydroxy-5-sulfonatophenyl)amino]-1,3,5-triazin-2-yl}amino)-5-carboxy-4-hydroxybenzene-1-sulfonate

Results and discussion

Particle sizeopen allclose all
Percentile:
D10
Mean:
9.5 µm
St. dev.:
0.4
Percentile:
D50
Mean:
433.5 µm
St. dev.:
56
Percentile:
D90
Mean:
1 116 µm
St. dev.:
198

Any other information on results incl. tables

Given standard deviation is based on the general experience with 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

Applicant's summary and conclusion