Registration Dossier
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EC number: 214-294-5 | CAS number: 1120-02-1
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:
- December 16, 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM B 822-92
- GLP compliance:
- no
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Mass median aerodynamic diameter:
- ca. 13.21 µm
- Percentile:
- D10
- Mean:
- ca. 2.59 µm
- Remarks on result:
- other: ultrasonic bath for 10 min
- Key result
- Percentile:
- D50
- Mean:
- ca. 9.4 µm
- Remarks on result:
- other: ultrasonic bath for 10 min
- Percentile:
- D90
- Mean:
- ca. 30.86 µm
- Remarks on result:
- other: ultrasonic bath for 10 min
- Conclusions:
- D50 = 9.4 µm
- Executive summary:
Method:
The test method ASTM B 822-92 was used to determine the particle size distribution of the test substance. The method adopted consists in a diffrattometic analysis. The tests for the determination of the granulometry were performed in duplicate on three samples of different lots of product. The test items were sampled from drums containing ~15 Kg of product using a sampling trier system for powders.
For the conduction of the study, the samples, properly dispersed in silicon oil, were introduced in the sample cell of a Coulter LS 200 Particle Analyzer and analysed.
Results:
The mean particle size of the test substance is 13.21 µm based on the mean of the 3 samples. The D50 results to be 9.4 µm.
Reference
From tests carried out in duplicate, Sample 1 returned an average value of the particle diameter equal to 11.60 mm and a maximum particle diameter equal to 52.63 mm.
From tests carried out in duplicate, Sample 2 returned an average value of the particle diameter equal to 14.44 mm and a maximum particle diameter equal to 57.77 mm.
From tests carried out in duplicate, Sample 3 returned an average value of the particle diameter equal to 13.79 mm and a maximum particle diameter equal to 57.77 mm.
Description of key information
D50 = 9.4 µm.
The mean particle size of the test substance is 13.21 µm (mean of the results on the three samples).
Additional information
The test method ASTM B 822-92 was used to determine the particle size distribution of the test substance. The method adopted consists in a diffrattometic analysis. The tests for the determination of the granulometry were performed in duplicate on three samples of different lots of product. The test items were sampled from drums containing ~15 Kg of product using a sampling trier system for powders.
For the conduction of the study, the samples, properly dispersed in silicon oil, were introduced in the sample cell of a Coulter LS 200 Particle Analyzer and analysed.
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