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EC number: 214-527-0 | CAS number: 1141-38-4
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:
- 19.07.2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- equivalent or similar 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
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Appearance: White poder
- Batch No.of test material: 001247069
- Purity: 99.96%
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: ambient
- Stability under test conditions: stable
TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: The test material was dispersed in acetone. - Mass median aerodynamic diameter:
- ca. 41.2 µm
- Geometric standard deviation:
- ca. 2.025
- Percentile:
- D10
- Mean:
- ca. 12.7 µm
- St. dev.:
- 0.022
- Percentile:
- D50
- Mean:
- ca. 31.7 µm
- St. dev.:
- 0.075
- Key result
- Percentile:
- D90
- Mean:
- ca. 75.1 µm
- St. dev.:
- 0.692
- Conclusions:
- The volume weighted mean out of 5 runs of 2,6-naphthalen dicarbolxylic acid is 41.2 µg. The average mode is 33.2 µg.
Reference
Table 1 : Full Test Results
|
Run 1 |
Run 2 |
Run 3 |
Run 4 |
Run 5 |
Average |
STDVP |
% STDVP |
VWM |
41.5 |
41.4 |
40.8 |
40.6 |
41.7 |
41.2 |
N/A |
N/A |
Mode |
33.3 |
33.2 |
33.2 |
33.2 |
33.2 |
33.2 |
N/A |
N/A |
d10 |
12.7 |
12.7 |
12.7 |
12.7 |
12.7 |
12.7 |
0.0216 |
0.170 |
d50 (Median) |
31.8 |
31.7 |
31.7 |
31.7 |
31.8 |
31.7 |
0.0754 |
0.238 |
d90 |
75.4 |
75.4 |
74.2 |
74.6 |
75.9 |
75.1 |
0.692 |
0.921 |
GSD |
2.035 |
2.030 |
2.014 |
2.007 |
2.038 |
2.025 |
0.012 |
0.6 |
All particle size results are in μm
5.32 % by volume of sample was seen to be < 10.00 μm
Definitions
VWM : volume weighted mean
d10 : 10 % of the test item is less than this particle size
d50 : 50 % of the test item is less than this particle size
d90 : 90 % of the test item is less than this particle size
GSD : geometric standard deviation of the lognormal particle size distribution
Average : calculated from the entirety of the data captured in each run and not a simple arithmetic mean
STDVP : standard deviation of the population
% STDVP : percentage standard deviation of the population
Description of key information
The volume weighted mean out of 5 runs of 2,6-naphthalen dicarbolxylic acid is 41.2 µg. The average mode is 33.2 µg.
Additional information
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