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EC number: 205-377-7 | CAS number: 139-85-5
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:
- 07 June - 8 June 2022
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Reliability 1
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- 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:
- other: D[4,3] – Mass Moment Mean – De Brouckere Mean Diameter
- Mean:
- 6.151 µm
- St. dev.:
- 0.123
- Key result
- Percentile:
- D10
- Mean:
- 2.264 µm
- Remarks on result:
- other: St. dev. not specified.
- Key result
- Percentile:
- D50
- Mean:
- 4.811
- Remarks on result:
- other: St. dev. not specified.
- Key result
- Percentile:
- D90
- Mean:
- 12.4
- Remarks on result:
- other: St. dev. not specified.
- Conclusions:
- The distribution of particle size for the test item was determined to be: d10 = 2.264 µm, d50 = 4.811 µm, and d90 = 12.400 µm.
- Executive summary:
The determination of particle size distribution for the test item was carried out in accordance with the method CIPAC MT 187 ( ISO 13320:2020) and following the Principles of GLP. The test was performed using Coulter LS 13 320 with ULM (Universal Liquid Model).A suspension of the test item of the adequate concentration was passed through a laser. The light scattered by the particles at various angles was measured by a multi-element detector and numerical values relating to the scattering pattern were then recorded for subsequent analysis. The percentiles for particle size distribution are: d10= 2.264 µm, d50= 4.811 µm, and d90= 12.400 µm. The mass moment mean (De Brouckere Mean Diameter) of the tested material is determined to 6.151 µm.
Reference
| Particle size | Test number and fraction size(µm) | |||||
| 1 | 2 | 3 | 4 | 5 | Average | |
| d10 [µm] | 2.266 | 2.262 | 2.254 | 2.250 | 2.288 | 2.264 |
| d50 [µm] | 5.022 | 4.910 | 4.806 | 4.730 | 4.585 | 4.811 |
| d90 [µm] | 12.67 | 11.84 | 12.57 | 12.81 | 12.11 | 12.4000 |
| * d4,3 [µm] | 6.294 | 6.042 | 6.187 | 6.225 | 6.006 | 6.151 |
| Average d4,3, [µm] | 6.151 | |||||
| Standard deviation, [µm] | 0.123 | |||||
| Relative Standard Deviation, [%] | 1.999 | |||||
Description of key information
Key study. Test method according to CIPAC MT 187 (and ISO 13320:2020), GLP study. The percentiles for particle size distribution are: d10= 2.264 µm, d50= 4.811 µm, and d90= 12.400 µm. The mass moment mean (De Brouckere Mean Diameter) of the tested material is determined to 6.151 µm.
Additional information
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