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EC number: 231-115-6 | CAS number: 7440-05-3
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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: This is a guideline experimental study, of unknown GLP status, minor restrictions in the design and/or reporting but otherwise acceptable for assessment.
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 9277:2010(E)
- Qualifier:
- according to guideline
- Guideline:
- other: AA_LP_814_BET_08
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 14488:2007(E)
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 13320:2009(E)
- Qualifier:
- according to guideline
- Guideline:
- other: SAA_Troken_DISP, SAA LB2000
- GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- other: dry dispersion
- Percentile:
- D50
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- Percentile:
- D10
- Mean:
- 34 µm
- Remarks on result:
- other: Range; 33 - 34 µm
- Percentile:
- D50
- Mean:
- 52 µm
- Remarks on result:
- other: Range; 51 - 53 µm
- Percentile:
- D90
- Mean:
- 79 µm
- Remarks on result:
- other: Range; 79 - 80 µm
- Conclusions:
- The average 10th, 50th and 90th percentile particle sizes for platinum were 34, 52 and 79 μm, respectively. The average specific surface area was determined as 0.230 ± 0.003 m2/g.
- Executive summary:
This is a guideline experimental study, of unknown GLP status, minor restrictions in the design and/or reporting but otherwise acceptable as the key study for this endpoint. The average 10th, 50th and 90th percentile particle sizes for palladium were 34, 52 and 79 μm, respectively. The average specific surface area was determined as 0.230 ± 0.003 m2/g.
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: This is a guideline experimental study, of unknown GLP status, minor restrictions in the design and/or reporting but otherwise acceptable for assessment.
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 9277:2010(E)
- Qualifier:
- according to guideline
- Guideline:
- other: AA_LP_814_BET_08
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 14488:2007(E)
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 13320:2009(E)
- Qualifier:
- according to guideline
- Guideline:
- other: SAA_Troken_DISP, SAA LB2000
- GLP compliance:
- not specified
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- other: dry dispersion
- Percentile:
- D50
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- Percentile:
- D10
- Mean:
- 0.093 µm
- Remarks on result:
- other: Range; 0.093 - 0.094 µm
- Percentile:
- D50
- Mean:
- 0.39 µm
- Remarks on result:
- other: Range; 0.38 - 0.39 µm
- Percentile:
- D90
- Mean:
- 1.04 µm
- Remarks on result:
- other: Range; 1.03 - 1.05 µm
- Conclusions:
- The average 10th, 50th and 90th percentile particle sizes for platinum were 0.093, 0.39 and 1.04 μm, respectively. The average specific surface area was determined as 25.5 ± 0.05 m2/g.
- Executive summary:
This is a guideline experimental study, of unknown GLP status, minor restrictions in the design and/or reporting but otherwise acceptable as the key study for this endpoint. The average 10th, 50th and 90th percentile particle sizes for palladium were 0.093, 0.39 and 1.04 μm, respectively. The average specific surface area was determined as 25.5 ± 0.05 m2/g.
Referenceopen allclose all
Mean specific surface area N-BET = 0.230 ± 0.003 m2/g. Range = 0.227 ± 0.001 to 0.232 ± 0.001 m2/g.
Table 1: N-BET analysis data and percentiles calculated from the particle size distribution for palladium
| Analysis 1 | Analysis 2 | Analysis 3 | Average | |
| Specific surface area N-BET (m2/g) | 0.227 ± 0.001 | 0.232 ± 0.001 | 0.230 ± 0.003 | |
| X10;3 (μm) | 33 | 33 | 34 | 34 |
| X50;3 (μm) | 51 | 53 | 52 | 52 |
| X90;3 (μm) | 79 | 80 | 79 | 79 |
Mean specific surface area N-BET = 25.5 ± 0.05 m2/g. Range = 25.5 ± 0.05 to 25.5 ± 0.04 m2/g.
Table 1: N-BET analysis data and percentiles calculated from the particle size distribution for palladium-mohr
| Analysis 1 | Analysis 2 | Analysis 3 | Average | |
| Specific surface area N-BET (m2/g) | 25.5 ± 0.05 | 25.5 ± 0.04 | 25.5 ± 0.05 | |
| X10;3 (μm) | 0.093 | 0.094 | 0.093 | 0.093 |
| X50;3 (μm) | 0.39 | 0.38 | 0.39 | 0.39 |
| X90;3 (μm) | 1.05 | 1.03 | 1.05 | 1.04 |
Description of key information
The average 10th, 50th and 90th percentile particle sizes for palladium were 34, 52 and 79 μm, respectively. The average specific surface area was determined as 0.230 ± 0.003 m2/g.
The average 10th, 50th and 90th percentile particle sizes for palladium black were 0.093, 0.39 and 1.04 μm, respectively. The average specific surface area was determined as 25.5 ± 0.05 m2/g.
Additional information
Potthoff (2012) is a non- GLP, guideline experimental study which is considered to be acceptable as the key study for this endpoint.
Particle size was determined for a sample of palladium powder and a sample of palladium black. The average 10th, 50th and 90th percentile particle sizes for palladium were 34, 52 and 79 μm, respectively. The average specific surface area was determined as 0.230 ± 0.003 m2/g. The average 10th, 50th and 90th percentile particle sizes for palladium were 0.093, 0.39 and 1.04 μm, respectively. The average specific surface area was determined as 25.5 ± 0.05 m2/g.
The dustiness of palladium and palladium black was tested in a modified Heubach procedure according to the guideline DIN 55992-1:2006. The studies are non-GLP, but follow a standard guideline and are considered to be reliable. The total dustiness of palladium powder was determined to be 284.26 mg/g. The inhalable fraction was 166.71 mg/g, the thoracic fraction was 18.37 mg/g and the respirable fraction was 2.36 mg/g. The Mass Median Aerodynamic Diameter (MMAD) was determined to be 30.2 μm with a geometric standard deviation of 1.9 μm. The total dustiness of palladium black was determined to be 457.02 mg/g. The inhalable fraction was 296.34 mg/g, the thoracic fraction was 103.03 mg/g and the respirable fraction was 36.73 mg/g. The Mass Median Aerodynamic Diameter (MMAD) was determined to be 24.1 μm with a geometric standard deviation of 2.6 μm.
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