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Physical & Chemical properties

Particle size distribution (Granulometry)

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Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
June 2006 to Feb 2007
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2007
Report Date:
2007

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: see principles of method if other than guideline section below
Principles of method if other than guideline:
The particle size of Beta ketosulfide was determined by laser diffraction in combination with MIE theory. The laser diffraction instrument was a Malvern Instruments Mastersizer 2000 with a Hydro 2000S dispersion cell. The test substance was dispersed into deionised water containing five drops of lgelpal CA 630 as a surfactant. The partical size distribution was evaluated over the range 0.02um to 2mm.
GLP compliance:
yes
Type of method:
Laser scattering/diffraction
Type of particle tested:
agglomerate
Type of distribution:
mass based distribution

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
Sponsor batch no: 151105Purity: 99.9%

Results and discussion

Mass median aerodynamic diameter:
ca. 46.74 µm
Geometric standard deviation:
ca. 2.28
Particle size
Percentile:
D50
Mean:
>= 46.74 µm
St. dev.:
2.28
Particle size distribution at different passagesopen allclose all
No.:
#1
Size:
ca. 10.749 µm
Distribution:
ca. 10 %
No.:
#2
Size:
ca. 40.337 µm
Distribution:
ca. 50 %
No.:
#3
Size:
ca. 849.785 µm
Distribution:
ca. 90 %

Applicant's summary and conclusion

Conclusions:
The particle size of Beta Ketosulfide was determined by laser diffraction in combination with Mie theory1The mass proportions below 10, 52.5 and 104. 7 µm were evaluated to be 8.95%, 55.77% and 62.89%, respectively. The d(0.5), theparticle size representing the mid-point in the mass distribution, was 40.3369 µm with a geometr ic standard deviation (GSD) of 2.28 µm. The mass median aerodynamic diameter (MMAD) was calculated, from the d(0.5) and the density of the test substance dctennined in this study, to be 46.74 µm.
Executive summary:

The particle size of Beta Ketosulfide was determined by laser diffraction in combination with Mie theory (European Commission Guidance Document on the Determination of particle size distribution, fibre length and diameter distribution of chemical substances EUR 20268 EN (2002) Draft.

 

The density of the test study determined in this study was 46.74um.