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Physical & Chemical properties

Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
20 Oct 1999 to 16 Feb 1999
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: Standardisation Committee for the building and construction industry of DEN Deutsches Institut für Normung e. V., Determination of soil samples, DIN 18123 "Bestimmung der Korngrößenverteilung"
Version / remarks:
Adopted April 1983
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
German GLP
Type of method:
sieving
Type of distribution:
other: sieving method
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material:
TVR 50
- Expiration date of the lot/batch:
September 01, 2004

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: At room temperature at about 20 °C
Mass median aerodynamic diameter:
< 23 µm
Remarks on result:
other: MMD < 23 µrn
Percentile:
D50
Mean:
23 µm
Remarks on result:
other: St. deviation not provided
Percentile:
other: 2.4%
Mean:
< 10 µm
Remarks on result:
other: St deviation not provided
No.:
#1
Size:
> 200 µm
Distribution:
0.02 %
No.:
#2
Size:
> 160 - <= 200 µm
Distribution:
0.02 %
No.:
#3
Size:
> 125 - <= 160 µm
Distribution:
0.09 %
No.:
#4
Size:
> 90 - <= 125 µm
Distribution:
0.06 %
No.:
#5
Size:
> 63 - <= 90 µm
Distribution:
0.22 %
No.:
#6
Size:
> 40 - <= 63 µm
Distribution:
0.75 %
No.:
#7
Size:
> 32 - <= 40 µm
Distribution:
0.44 %
No.:
#8
Size:
> 15 - <= 32 µm
Distribution:
93.8 %
No.:
#9
Size:
> 8 - <= 15 µm
Distribution:
6.27 %
No.:
#10
Size:
> 5 - <= 8 µm
Distribution:
0.24 %
Remarks on result:
other: no particles were found less than 5 µm

The results obtained in the first and second experiment showed no relevant difference. Therefore the study is considered to be valid and no further sieving tests had to be performed.

The results for the particle size distribution of FAT 40'571/A obtained by calculation of the mean values of the experiments evaluated. It could be stated that < 2.4 wt% of the particles in FAT 40'571/A showed a particle size lower than 10 µm. About 50 wt% of FAT 40'571/A were determined by sieve analysis to be smaller than about 23 µrn (median mass diameter).

Conclusions:
Test substance showed a particle size lower than 10 µm.
Executive summary:

The determination of the particle size distribution of FAT 40'571/A was based on the OECD 110 guideline. The test article was judged visually to be a brown to black fine-grained powder with a greenish shine. FAT 40'571/A was found to consist of red broken particles with a plane surface in the preliminary test using a microscope.

The sieving test of FAT 40'571/A was performed in duplicate. The results obtained in the first and second experiment showed no relevant difference. Therefore, the study is considered to be valid and no further sieving tests had to be performed.

The results for the particle size distribution of FAT 40'571/A obtained by calculation of the mean values of the experiments evaluated. The cumulative particle size distribution curves obtained in the first and second experiment.

 

In conclusion, it could be stated that < 2.4 wt% of the particles in FAT 40'571/A showed a particle size lower than 10 µm. About 50 wt% of FAT 40'571/A were determined by sieve analysis to be smaller than about 23 µm (median mass diameter).

Description of key information

The mass median diameter of  the Reactive Brown 49 was found being 23 µm.

Additional information

The determination of the particle size distribution of Reactive Brown 49 was based on the OECD 110 guideline. The results for the particle size distribution of Reactive Brown 49 obtained by calculation of the mean values of the experiments evaluated. The cumulative particle size distribution curves obtained in the first and second experiment.

 

In conclusion, it could be stated that < 2.4 wt% of the particles in Reactive Brown 49 showed a particle size lower than 10 µm. About 50 wt% of Reactive Brown 49 were determined by sieve analysis to be smaller than about 23 µm (median mass diameter).