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EC number: 262-911-1 | CAS number: 61698-32-6
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:
- From 28 January 2022 to 11 March 2022
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- ISO 13320 (Particle size analysis - Laser diffraction methods)
- Version / remarks:
- 2020
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Specific details on test material used for the study:
- Actual storage conditions: Stored in original plastic bag in a ventilated closed cupboard at normal laboratory temperature.
- Percentile:
- D10
- Mean:
- 1.41 µm
- Remarks on result:
- other: The particle size distribution values do not differ by more than 20% between the three measurements.
- Percentile:
- D50
- Mean:
- 3.84 µm
- Remarks on result:
- other: The particle size distribution values do not differ by more than 20% between the three measurements.
- Percentile:
- D90
- Mean:
- 6.76 µm
- Remarks on result:
- other: The particle size distribution values do not differ by more than 20% between the three measurements.
- Size:
- < 2 µm
- Distribution:
- 15.63 %
- Remarks on result:
- other: OECD 110 guideline cut-off values
- Size:
- >= 2 - <= 200 µm
- Distribution:
- 84.37 %
- Remarks on result:
- other: OECD 110 guideline cut-off values
- Size:
- > 200 µm
- Distribution:
- 0 %
- Remarks on result:
- other: OECD 110 guideline cut-off values
- Size:
- > 100 µm
- Distribution:
- 0 %
- Remarks on result:
- other: Cut-off values for workplace risk assessment: (non-)inhalable fraction
- Size:
- < 10 µm
- Distribution:
- 98.49 %
- Remarks on result:
- other: Cut-off values for workplace risk assessment: thoracic fraction
- Size:
- < 4 µm
- Distribution:
- 53.41 %
- Remarks on result:
- other: Cut-off values for workplace risk assessment: respirable fraction
- Size:
- < 500 µm
- Distribution:
- 100 %
- Remarks on result:
- other: Cut-off point for dust explosion
- Conclusions:
- The test item has potential concern for inhalation exposure and dust explosion.
- Executive summary:
The particle size distribution of the test item was determined according to ISO 13320 guideline, using laser diffraction method, and under GLP.
Three measurements were recorded, showing a single peak. Distribution for cut-off values of interest was derived from the average. D10, D50 and D90 are 1.41, 3.84 and 6.76 µm, respectively.
These results confirm the description of the substance as a fine powder.
Reference
Results above are the average of measurements 1, 2 and 3.
The following table summarizes the cumulative distribution between 2 μm and 200 μm:
| Diameter (µm) | 2.3 | 3.4 | 4.5 | 5.9 | 6.7 | 8.8 | 11.6 | 15.2 | 17.4 | 200.0 |
Cumulative | 19.17 | 40.68 | 62.81 | 82.94 | 89.80 | 97.08 | 99.38 | 99.92 | 100.0 | 100.0 |
Only one peak was observed. Therefore no particle size distribution deconvolution is needed.
The particle size distribution values do not differ by more than 20% between the three measurements.
Description of key information
The test item is a fine powder, with potential concern for inhalation exposure and dust explosion.
D10, D50 and D90 are 1.41, 3.84 and 6.76 µm, respectively. (ISO 13320, laser diffraction, GLP; Noel Y., 2022)
Additional information
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