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EC number: 215-575-5 | CAS number: 1332-77-0
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:
- 15/06/2010 to 16/06/2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- other: BS ISO 13320-1:1999
- Deviations:
- not specified
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 187
- Deviations:
- not specified
- GLP compliance:
- yes
- Type of method:
- Laser scattering/diffraction
- Type of distribution:
- volumetric distribution
- Percentile:
- D10
- Mean:
- 8.087 µm
- St. dev.:
- 0.72
- Percentile:
- D50
- Mean:
- 25.057 µm
- St. dev.:
- 0.61
- Percentile:
- D90
- Mean:
- 71.569 µm
- St. dev.:
- 1.27
- Conclusions:
- The test substance was assessed for particle size distribution according to OECD Guideline 110, CIPAC Method MT 187 and BS ISO 13320-1:1999. The d50 was 25.057 μm. 14.49 % by volume of sample was seen to be < 10.00 μm. Coefficient of variation for d50 is less than 3 %; d10 and d90 are less than 5 %. Thus repeatibility of the characteristic particles in the size distribution are within the acceptable limits as per the BS ISO 13320-1 test standard.
- Executive summary:
The test substance was assessed for particle size distribution according to OECD Guideline 110, CIPAC Method MT 187 and BS ISO 13320-1:1999 under GLP compliance. Laser diffraction method was used. The d50 was 25.057 μm. 14.49 % by volume of sample was seen to be < 10.00 μm. Coefficient of variation for d50 is less than 3 %; d10 and d90 are less than 5 %. Thus repeatibility of the characteristic particles in the size distribution are within the acceptable limits as per the BS ISO 13320-1 test standard.
Reference
The particle size was analysed over the range 0.02 to 2000 μm.
Full test results:
|
Run 1 |
Run 2 |
Run 3 |
Run 4 |
Run 5 |
** Average |
Volume weighted mean |
34.927 |
34.253 |
33.427 |
33.780 |
33.560 |
33.989 |
Median (d50) |
26.363 |
24.973 |
24.975 |
24.967 |
25.014 |
25.057 |
Mode (μm) |
25.801 |
25.467 |
25.807 |
25.480 |
25.153 |
25.549 |
*MMAD |
35.052 |
34.514 |
34.512 |
34.505 |
34.57 |
34.63 |
10 % of material is > |
8.198 |
8.071 |
8.084 |
8.044 |
8.038 |
8.087 |
50 % of material is > |
25.363 |
24.973 |
24.972 |
24.967 |
25.014 |
25.057 |
90 % of material is > |
73.048 |
71.663 |
70.171 |
71.462 |
71.550 |
71.569 |
All results are in μm.
* Mean Mass Aerodynamic Diameter
** Average result is calculated from the entirety of the data captured in each run and is not a simple arithmetic mean.
14.49 % by volume of sample was seen to be < 10 μm.
Standard deviation results:
Run No. |
1 |
2 |
3 |
4 |
5 |
STDVP |
% STDV |
d10 |
8.198 |
8.071 |
8.084 |
8.044 |
8.039 |
0.06 |
0.72 |
d50 |
25.363 |
24.973 |
24.972 |
24.967 |
25.014 |
0.15 |
0.61 |
d90 |
73.048 |
71.663 |
70.181 |
71.462 |
71.550 |
0.91 |
1.27 |
d15.78 |
29.040 |
29.610 |
29.520 |
29.650 |
29.720 |
0.24 |
0.82 |
GSD |
0.873 |
0.843 |
0.846 |
0.842 |
0.842 |
0.01 |
1.43 |
MMAD |
35.052 |
34.514 |
34.512 |
34.505 |
34.570 |
0.21 |
0.61 |
GSD = Geometric standard deviation
Coefficient of variation for d50 is less than 3 %; d10 and d90 are less than 5 %. Thus repeatibility of the characteristic particles in the size distribution are within the acceptable limits as per the BS ISO 13320-1 test standard.
Description of key information
The test substance was assessed for particle size distribution according to OECD Guideline 110, CIPAC Method MT 187 and BS ISO 13320-1:1999 under GLP compliance. Laser diffraction method was used. The d50 was 25.057 μm. 14.49 % by volume of sample was seen to be < 10.00 μm. Coefficient of variation for d50 is less than 3 %; d10 and d90 are less than 5 %. Thus repeatibility of the characteristic particles in the size distribution are within the acceptable limits as per the BS ISO 13320-1 test standard.
Additional information
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