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EC number: 939-512-2 | CAS number: 85681-55-6
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:
- weight of evidence
- Study period:
- 22/07/2012-01/08/2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Guideline:
- other: ISO 13320:2009 and CIPAC MT 187
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Type of distribution:
- volumetric distribution
- Mass median aerodynamic diameter:
- >= 327.38 - <= 345.769 µm
- Geometric standard deviation:
- >= 1.845 - <= 1.867
- Percentile:
- D50
- Remarks on result:
- not measured/tested
- Conclusions:
- The average Mass Median Aerodynamic Diameter (MMAD) of the test material was 339.301 μm.
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 19/07/2012 - 01/08/2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Guideline:
- other: ISO 13320:2009 and CIPAC MT 187
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- Laser scattering/diffraction
- Type of particle tested:
- primary particle
- Type of distribution:
- volumetric distribution
- Mass median aerodynamic diameter:
- >= 545.032 - <= 597.083 µm
- Geometric standard deviation:
- >= 1.891 - <= 1.948
- Percentile:
- D50
- Remarks on result:
- not measured/tested
- Conclusions:
- The average Mass Median Aerodynamic Diameter (MMAD) of the test material was 572.394 μm.
Referenceopen allclose all
Standard visual observation
Sample observed to be a coarse, free flowing, white powder.
Observation at 100 x magnification
The particles appeared to be irregular shape. The smallest individual particle size was approximately 16 μm and the largest individual size was approximately 1440 μm.
Observation at 400 x magnification
The sample was observed to be made up of single crystalline particles.
LASER DIFFRACTION PARTICLE SIZE ANALYSIS
Table 1 : Full Test Results
|
RUN 1 |
RUN 2 |
RUN 3 |
RUN 4 |
RUN 5 |
**Average |
Volume weighted Mean |
333.191 |
355.433 |
347.543 |
347.979 |
353.630 |
347.555 |
Median (d.50) |
286.033 |
302.099 |
296.555 |
296.020 |
302.008 |
296.449 |
Mode (μm) |
289.311 |
302.114 |
298.840 |
298.022 |
304.734 |
298.492 |
*MMAD |
327.380 |
345.769 |
339.423 |
338.810 |
345.663 |
339.301 |
10 % of material is < |
130.341 |
136.709 |
134.278 |
133.062 |
136.259 |
134.072 |
50 % of material is < |
286.033 |
302.099 |
296.555 |
296.020 |
302.008 |
296.449 |
90 % of material is < |
606.719 |
654.299 |
636.252 |
640.084 |
647.881 |
637.121 |
All results are in μm
*Mass Median Aerodynamic Diameter
**Average result is calculated from the entirety of data captured in each run and is not a simple arithmetic mean.
0.0 % by volume of sample was seen to be < 10.00 μm.
Table 2 : Standard Deviation results
Run No. |
1 |
2 |
3 |
4 |
5 |
STDVP |
% STDVP |
d10 |
130.341 |
136.709 |
134.278 |
133.062 |
136.259 |
2.31 |
1.72 |
d50 |
286.033 |
302.099 |
296.555 |
296.020 |
302.008 |
5.86 |
1.97 |
d90 |
606.719 |
654.299 |
636.252 |
640.084 |
647.881 |
16.40 |
2.57 |
d15.78 |
155.024 |
162.636 |
159.839 |
158.595 |
162.377 |
2.79 |
1.75 |
*GSD |
1.845 |
1.858 |
1.855 |
1.867 |
1.860 |
0.01 |
0.38 |
MMAD |
327.380 |
345.769 |
339.423 |
338.810 |
345.663 |
6.70 |
1.97 |
*GSD = Geometric standard deviation
Coefficient of variation for d50 is less than 3%; d10 and d90 are less than 5%. Thus
repeatability of the characteristic particles in the size distribution are within the acceptable
limits as per the ISO 13320-1 test standard.
Standard visual observation
Sample observed to be a coarse, free flowing, white powder.
Observation at 100 x magnification
The particles appeared to be irregular shape. The smallest individual particle size was approximately 16 μm and the largest individual size was approximately 1456 μm.
Observation at 400 x magnification
The sample was observed to be made up of single crystalline particles.
LASER DIFFRACTION PARTICLE SIZE ANALYSIS
Table 1 : Full Test Results
|
RUN 1 |
RUN 2 |
RUN 3 |
RUN 4 |
RUN 5 |
**Average |
Volume weighted Mean |
574.341 |
549.815 |
581.982 |
587.755 |
602.399 |
579.259 |
Median (d.50) |
495.949 |
476.196 |
501.543 |
507.103 |
521.674 |
500.103 |
Mode (μm) |
508.045 |
489.839 |
525.669 |
531.551 |
550.904 |
520.127 |
*MMAD |
567.639 |
545.032 |
574.042 |
580.405 |
597.083 |
572.394 |
10 % of material is < |
219.263 |
210.744 |
213.073 |
216.370 |
224.007 |
216.551 |
50 % of material is < |
495.949 |
476.196 |
501.543 |
507.103 |
521.674 |
500.103 |
90 % of material is < |
1058.101 |
1009.712 |
1081.177 |
1089.773 |
1111.359 |
1070.499 |
All results are in μm
*Mass Median Aerodynamic Diameter
**Average result is calculated from the entirety of data captured in each run and is not a simple arithmetic mean.
0.0 % by volume of sample was seen to be < 10.00 μm.
Table 2 : Standard Deviation results
Run No. |
1 |
2 |
3 |
4 |
5 |
STDVP |
% STDVP |
d10 |
219.263 |
210.744 |
213.073 |
216.370 |
224.007 |
4.66 |
2.15 |
d50 |
495.949 |
476.196 |
501.543 |
507.103 |
521.674 |
14.86 |
2.97 |
d90 |
1058.101 |
1009.712 |
1081.177 |
1089.773 |
1111.359 |
34.65 |
3.24 |
d15.78 |
261.735 |
251.772 |
257.463 |
261.016 |
269.425 |
5.77 |
2.22 |
*GSD |
1.895 |
1.891 |
1.948 |
1.943 |
1.936 |
0.02 |
1.27 |
MMAD |
567.639 |
545.032 |
574.042 |
580.405 |
597.083 |
17.01 |
2.97 |
*GSD = Geometric standard deviation
Coefficient of variation for d50 is less than 3%; d10 and d90 are less than 5%. Thus
repeatability of the characteristic particles in the size distribution are within the acceptable
limits as per the ISO 13320-1 test standard.
Description of key information
The particle size distribution of two commercial grades of the substance were measured. The average Mass Median Aerodynamic Diameter (MMAD) of the coarse grade was 339.301 μm, whilst the average MMAD of the flake grade was 572.394 μm.
Additional information
The particle size distribution of two commercial grades of the substance were measured in accordance with ISO 13320:2009 and CIPAC MT 187 using a Malvern Mastersizer 2000 Laser Diffraction Particle Size Analyzer. The average Mass Median Aerodynamic Diameter (MMAD) of the coarse grade was 339.301 μm, whilst the average MMAD of the flake grade was 572.394 μm.
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