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Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
21-26 February 2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study has been performed in accordance with the ISO 13320 and CIPAC MT 187 guidelines and complied with the principles of GLP.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2014
Report date:
2014

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: ISO 13320:2009
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 187
GLP compliance:
yes (incl. QA statement)
Type of distribution:
volumetric distribution

Test material

Constituent 1
Chemical structure
Reference substance name:
N-bromosuccinimide
EC Number:
204-877-2
EC Name:
N-bromosuccinimide
Cas Number:
128-08-5
Molecular formula:
C4H4BrNO2
IUPAC Name:
1-bromopyrrolidine-2,5-dione
Test material form:
other: powder with lumps
Details on test material:
- Name of test material (as cited in study report): N-Bromo-succinimide
- Substance type: mono-constituent
- Description: Slightly yellowish powder with lumps
- Storage condition of test material: In refrigerator (2-8°C) under nitrogen protected from light
- Reactive to light and moisture

Results and discussion

Mass median aerodynamic diameter:
134.8 - 139.1 µm
Geometric standard deviation:
1.88 - 1.91
Particle sizeopen allclose all
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:
41.044 µm
St. dev.:
0.263
Remarks on result:
other: Population standard deviation [µm]
Percentile:
D50
Mean:
94.74 µm
St. dev.:
1.205
Remarks on result:
other: Population standard deviation [µm]. Median.
Percentile:
D90
Mean:
184.091 µm
St. dev.:
2.853
Remarks on result:
other: Population standard deviation [µm]
Particle size distribution at different passages
Size:
< 10 µm
Distribution:
1.76 %

Any other information on results incl. tables

MMAD mean: 137 µm

Mode: 105 µm

 

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. 

Applicant's summary and conclusion

Conclusions:
The particle size distribution of the substance was determined by laser diffraction analysis-'wet' small volume dispersion method (GLP-compliant study in accordance with ISO 13320 and CIPAC MT 187); MMAD= 137 µm; 1.76% is< 10.00 µm; 10% is < 41.0 µm; 50% is < 94.7 µm and 90% is < 184 µm.