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Physical & Chemical properties

Particle size distribution (Granulometry)

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Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-03-19
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
The particle size distribution was analysed by laser diffraction using the instrument Malvern Mastersizer X. Isobutanol was poured into the dispersing unit, and pumped trough the system. It was made sure that no air bubbles were present. A concentrated slurry of the sample in dispersant was made in a beaker with vigorous stirring. Alignment was performed and the background was measured. The sample was added from the slurry into the dispersing unit with a cut-off plastic Pasteur pipette. The sample was adjusted until an acceptable obscuration (15-25%) of the laser beam was obtained.
The dispersion was homogenized after 5 minutes and the particle size distribution was measured.
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Mass median aerodynamic diameter:
5 µm
Key result
Percentile:
D10
Mean:
2 µm
St. dev.:
2
Remarks on result:
other: no standard deviation due to one sample
Key result
Percentile:
D50
Mean:
5 µm
St. dev.:
5
Remarks on result:
other: no standard deviation due to one sample
Key result
Percentile:
D90
Mean:
12 µm
St. dev.:
12
Remarks on result:
other: no standard deviation due to one sample
No.:
#1
Size:
< 10 µm
Distribution:
83.4 %
No.:
#2
Size:
< 50 µm
Distribution:
100 %
No.:
#3
Size:
< 100 µm
Distribution:
100 %
Conclusions:
The particle size distribution of the test item Charmor DP15 was determined by laser diffraction.
The average of the median particle size L50 was:
L50 = 5 µm
The average of the particle size L10 was:
L10 = 2 µm
The average of the particle size L90 was:
L90 = 12 µm

100% of Charmor DP 15 2 is in the inhalable fraction (< 100 µm)
Executive summary:

The particle size distribution of the test item Charmor DP15 was determined by laser diffraction.

The average of the median particle size L50 was:

L50 = 5 µm

The average of the particle size L10 was:

L10 = 2 µm

The average of the particle size L90 was:

L90 = 12 µm

100% of Charmor DP 15 is in the inhalable fraction (< 100 µm).

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-03-05
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
The particle size distribution was analysed by laser diffraction using the instrument Malvern Mastersizer X. Isobutanol was poured into the dispersing unit, and pumped through the system. It was made sure that no air bubbles were present. A concentrated slurry of the sample in dispersant was made in a beaker with vigorous stirring. Alignment was performed and the background was measured. The sample was added from the slurry into the dispersing unit with a cut-off plastic Pasteur pipette. The sample was adjusted until an acceptable obscuration (15-25%) of the laser beam was obtained.
The dispersion was homogenized after 5 minutes and the particle size distribution was measured.
GLP compliance:
no
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution
Key result
Percentile:
D10
Mean:
12 µm
St. dev.:
12
Key result
Percentile:
D50
Mean:
69 µm
St. dev.:
69
Key result
Percentile:
D90
Mean:
292 µm
St. dev.:
292
No.:
#1
Size:
< 10 µm
Distribution:
23.9 %
No.:
#2
Size:
< 50 µm
Distribution:
73.2 %
No.:
#3
Size:
< 100 µm
Distribution:
93.2 %
Conclusions:
The particle size distribution of the test item Di-Pentaerythritol was determined by laser diffraction.
The average of the median particle size L50 was:
L50 = 69 µm
The average of the particle size L10 was:
L10 = 12 µm
The average of the particle size L90 was:
L90 = 292 µm

93% of Di-Pentaerythritol is in the inhalable fraction (<100 µm).
Executive summary:

The particle size distribution of the test item Di-Pentaerythritol was determined by laser diffraction.

The average of the median particle size L50 was:

L50 = 69 µm

The average of the particle size L10 was:

L10 = 12 µm

The average of the particle size L90 was:

L90 = 292 µm

93% of Di-Pentaerythritol is in the inhalable fraction (<100 µm).

Description of key information

The particle size distribution of the test item Di-Pentaerythritol was determined by laser diffraction.

The average of the median particle size L50 was:

L50 = 69 µm

The average of the particle size L10 was:

L10 = 12 µm

The average of the particle size L90 was:

L90 = 292 µm

93% of Di-Pentaerythritol is in the inhalable fraction (<100 µm).

 

The particle size distribution of the test item Charmor DP15 was determined by laser diffraction.

The average of the median particle size L50 was:

L50 = 5 µm

The average of the particle size L10 was:

L10 = 2 µm

The average of the particle size L90 was:

L90 = 12 µm

 

100% of Charmor DP 15 is in the inhalable fraction (< 100 µm).

Additional information