Registration Dossier
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EC number: 245-740-7 | CAS number: 23564-05-8
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2020-09-29
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Type of distribution:
- volumetric distribution
- Key result
- Percentile:
- D10
- Mean:
- 6.02 µm
- Remarks on result:
- other: St. dev. not reported
- Key result
- Percentile:
- D50
- Mean:
- 14.1 µm
- Remarks on result:
- other: St. dev. not reported
- Key result
- Percentile:
- D90
- Mean:
- 30.7 µm
- Remarks on result:
- other: St. dev. not reported
- Conclusions:
- The D10, D50 and D90 percentile were determined as D10 = 6.02 µm, D50 = 14.1 µm and D90 = 30.7 µm, respectively.
- Executive summary:
A study was conducted according to CIPAC MT 187 to determine the particle size distribution of the test item by laser diffraction. By the dry method without compressed air, the agglomerates of test substance (mode size 63 - 72 µm) were observed. The agglomerates could not be completely dispersed by applying compressed air. Therefore, the primary particles of the test substance were observed by the wet method. The D10, D50 and D90 percentile were determined as D10 = 6.02 µm, D50 = 14.1 µm and D90 = 30.7 µm, respectively.
Reference
The primary particles of the test substance were observed by the wet method. The values for sizes at 10 %, 50 % and 90 % (D10, D50 and D90) were 6.02 µrn, 14.1 µm and 30.7 µrn, respectively. By the dry method without compressed air, the agglomerates of test substance (mode size 63 - 72 µm) were observed. Although some agglomerates were finely dispersed with applying compressed air (0.40 MPa), they could not be completely dispersed.
Description of key information
The D10, D50 and D90 percentile were determined as D10 = 6.02 µm, D50 = 14.1 µm and D90 = 30.7 µm, respectively.
Additional information
A study was conducted according to CIPAC MT 187 to determine the particle size distribution of the test item by laser diffraction. By the dry method without compressed air, the agglomerates of test substance (mode size 63 - 72 µm) were observed. The agglomerates could not be completely dispersed by applying compressed air. Therefore, the primary particles of the test substance were observed by the wet method. The D10, D50 and D90 percentile were determined as D10 = 6.02 µm, D50 = 14.1 µm and D90 = 30.7 µm, respectively.
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