Registration Dossier
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EC number: 908-381-3 | CAS number: -
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Not GLP but well documented
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: ISO 2591-1
- Principles of method if other than guideline:
- A dry sieving technique was applied to determine the particle size distribution of the test substance. Each trial was performed with around 100 g of substance. Nine metal wire sieves with calibrated meshes (4 750, 3 360, 2 380, 1 700, 1 190, 833, 600, 417 and 125 µm) were stacked and submitted to automatic vertical vibrations during 30 min. Each sieve was weighed before and after sieving. Three replicates were performed according to GRAN-94003 (internal method based on ISO 2591-1).
- GLP compliance:
- no
Test material
- Reference substance name:
- reaction mass of calcium sulfate,magnesium dihydroxide,calcium carbonate
- IUPAC Name:
- reaction mass of calcium sulfate,magnesium dihydroxide,calcium carbonate
- Details on test material:
- Batch number: SOLVCAT
Samplilng date: 2 September 2009
Constituent 1
Results and discussion
Particle size
- Percentile:
- D50
- Mean:
- ca. 2 990 µm
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Any other information on results incl. tables
Table 1 :individual values, mean value and standard deviation obtained for oversize (retained fraction) on each sieve
Sieve mesh (µm) |
Trial 1 Oversize (%) |
Trial 2 Oversize (%) |
Trial 3 Oversize (%) |
Mean value (%) |
Standard deviation (%) |
4 750 |
3.79 |
3.73 |
3.52 |
3.68 |
0.14 |
3 360 |
32.86 |
30.52 |
33.43 |
32.3 |
1.5 |
2 380 |
42.09 |
41.84 |
40.37 |
41.4 |
0.9 |
1 700 |
14.99 |
16.19 |
15.23 |
15.5 |
0.6 |
1 190 |
5.57 |
6.84 |
6.56 |
6.3 |
0.7 |
833 |
0.19 |
0.21 |
0.23 |
0.21 |
0.02 |
600 |
0.14 |
0.24 |
0.23 |
0.20 |
0.06 |
417 |
0.07 |
0.10 |
0.13 |
0.10 |
0.03 |
125 |
0.10 |
0.16 |
0.14 |
0.13 |
0.03 |
0 |
0.19 |
0.17 |
0.16 |
0.17 |
0.02 |
Applicant's summary and conclusion
- Executive summary:
D50 (µm)
D10 (µm)
D90 (µm)
Trial 1
3 011.85
1 848.56
4 449.11
Trial 2
2 951.01
1 782.43
4 424.03
Trial 3
3 005.65
1 798.69
4 441.83
Mean value
2 990
1 810
4 438
Standard deviation
30
30
13
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