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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:
17 April 2018 - 19 June 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Version / remarks:
ISO 13320:2009
Deviations:
no
Qualifier:
according to
Guideline:
other: CIPAC MT 187
Deviations:
no
Qualifier:
according to
Guideline:
other: Chilworth Technology Ltd SOP No. 417
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
Laser scattering/diffraction
Type of distribution:
volumetric distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
Physical state: solid
Appearance: White powder
Specific details on test material used for the study:
- Batch n°: I16DD2146
- Expiration date: 27 April 2018
- Purity: 99.7% (based on GC assay)
- Storage condition of test material: At room temperature

Results and discussion

Mass median aerodynamic diameter:
401 µm
Geometric standard deviation:
>= 1.967 - <= 2.024
Particle sizeopen allclose all
Percentile:
D10
Mean:
139 µm
St. dev.:
0.679
Remarks on result:
other: Average result is calculated from the entirety of data captured in each run and is not a simple arithmetic mean.
Key result
Percentile:
D50
Mean:
345 µm
St. dev.:
3.08
Remarks on result:
other: Average result is calculated from the entirety of data captured in each run and is not a simple arithmetic mean.
Percentile:
D90
Mean:
682 µm
St. dev.:
14.5
Remarks on result:
other: Average result is calculated from the entirety of data captured in each run and is not a simple arithmetic mean.

Any other information on results incl. tables

Visual Microscope Analysis

(1) Standard visual observation: sample observed to be a coarse, gritty, free flowing white powder with clusters.

(2) 10 objective lens: particles appeared to be irregular shaped crystals with rough surface (smallest +/- 6 μm and largest 992 μm)

(3) 40 objective lens: sample was observed to be made up of single crystalline particles.

Solubility and Dispersability Test

The sample proved to be insoluble and well dispersed in silicone oil. Therefore, silicone oil was used as the disperant.

Laser Diffraction Particle Size Analysis

Using the identified parameters, the particle size was analysed over the range 0.01 µm to 3500 µm.

The average Volume weighted Mean was 382 µm and the mode was 383 µm. The Coefficient of Variation for d50 was <3%; d10 and d90 were <5%. Thus the repeatability of the characteristic particles in the size distribution was within the acceptable limits according to the ISO 13320-1 test standard.

Applicant's summary and conclusion

Conclusions:
Observation using 10 objective lens showed irregular shaped crystals between approximately 6 µm and 992 µm.
The particle size distribution of T003688 determined by the laser diffraction method led to the conclusion that the average volume weighted mean based on 5 runs was 382 µm and the Mass Median Aerodynamic Diameter (MMAD) based on 5 runs was 401 µm, whereas the average D10, D50 and the D90 were determined to be 139 µm, 345 µm and 682 µm, respectively.