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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
Study period:
2022
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2022
Report date:
2022

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
other: CIPAC Hand book K MT 187 methode (2003)
Version / remarks:
2003
Deviations:
no
Principles of method if other than guideline:
During the laser diffraction measurement, particles were passed through a focused
laser beam. These particles scattered light at an angle that was inversely proportional to their
size. The angular intensity of the scattered light was then measured by a series of
photosensitive detectors. The number and positioning of these detectors has been optimized
in this model of apparatus to achieve maximum resolution across a broad range of sizes.
This apparatus in dry dispersion method uses a single wavelength detection system:
A red-light measurement with a Helium-Neon laser is used.
GLP compliance:
yes (incl. QA statement)
Other quality assurance:
other: Standard Operating Procedures in use at DEFITRACES and the Good Laboratory Practice Standards: - Directive 2004/10/EC – French reference: Article Annexe II à l’article D523-8 du code de l’Environnement; - OECD Principles of Good laboratory Practice, as r
Type of method:
Laser scattering/diffraction
Remarks:
Malvern Instruments – MS 3000 Dry dispersion unit: Aero S dry powder disperser and AERO measurement cell
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
Lithium iodide
EC Number:
233-822-5
EC Name:
Lithium iodide
Cas Number:
10377-51-2
Molecular formula:
ILi
IUPAC Name:
lithium iodide
Test material form:
solid
Specific details on test material used for the study:
batch number : 1100521A-0915P

Results and discussion

Mass median aerodynamic diameter:
>= 12.7 - <= 586 µm
Particle sizeopen allclose all
Key result
Percentile:
D90
Mean:
ca. 337 µm
St. dev.:
2.85
Key result
Percentile:
D50
Mean:
ca. 148 < µm
St. dev.:
2.11
Key result
Percentile:
D10
Mean:
ca. 75.3 µm
St. dev.:
2.07
Particle size distribution at different passagesopen allclose all
No.:
#6
Size:
< 337 µm
Distribution:
< 90 %
No.:
#6
Size:
< 148 µm
Distribution:
< 50 %
No.:
#6
Size:
< 75.3 µm
Distribution:
< 10 %
No.:
#5
Size:
< 346 µm
Distribution:
< 90 %
No.:
#5
Size:
< 151 µm
Distribution:
< 50 %
No.:
#5
Size:
< 76.4 µm
Distribution:
< 10 %
No.:
#4
Size:
< 342 µm
Distribution:
< 90 %
No.:
#4
Size:
< 150 µm
Distribution:
< 50 %
No.:
#4
Size:
< 76 µm
Distribution:
< 10 %
No.:
#3
Size:
< 334 µm
Distribution:
< 90 %
No.:
#3
Size:
< 148 µm
Distribution:
< 50 %
No.:
#3
Size:
< 76.7 µm
Distribution:
< 10 %
No.:
#2
Size:
< 322 µm
Distribution:
< 90 %
No.:
#2
Size:
< 143 µm
Distribution:
< 50 %
No.:
#2
Size:
< 73.1 µm
Distribution:
< 10 %
No.:
#1
Size:
< 341 µm
Distribution:
< 90 %
No.:
#1
Size:
< 74.1 µm
Distribution:
< 10 %
No.:
#1
Size:
< 148 µm
Distribution:
< 50 %

Applicant's summary and conclusion

Conclusions:
The particle size distribution of the test item was found to range approximately from 12.7 µm to 586 µm.

The following values were obtained for the test item:
- The mean diameter in volume was 180 µm.
- The mean diameter in surface was 127 µm.
- The particle size D(0.1) was 75.3 µm.
- The particle size D(0.5) was 148 µm.
- The particle size D(0.9) was 337 µm.
Executive summary:

In compliance with CIPAC Handbook K - MT 187 method (2003)