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Physical & Chemical properties

Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Mar - Jun 2005
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to guideline
Guideline:
other: European Commission, Directorate General XII-JRC, Science Research and Development-Joint Research Centre. "Particle Size Distribution, Fibre Length and Diameter Distribution" Guidance Document, ECB/TM/February 1996
Principles of method if other than guideline:
In the present study the laser scattering / diffraction method combined with the sieving was applied.
GLP compliance:
yes (incl. QA statement)
Type of method:
other: laser scattering / diffraction and sieving
Type of particle tested:
primary particle
Type of distribution:
mass based distribution
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source (i.e. manufacturer or supplier) and lot/batch number of test material: 4G08
- Purity, including information on contaminants, isomers, etc.: approx 95% no further information

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: at room temperature at about 20 °C in dry conditions
- Stability and homogeneity of the test material in the vehicle/solvent under test conditions (e.g. in the exposure medium) and during storage: not stated but assumed stable
- Stability in the medium, i.e. sensitivity of the test material to hydrolysis and/or photolysis: not stated but assumed stable
- Solubility and stability of the test material in the solvent/vehicle and the exposure medium: no solvent/ vehicle used
- Reactivity of the test material with the incubation material used (e.g. plastic ware): no reactivity assumed

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
no treatment

FORM AS APPLIED IN THE TEST (if different from that of starting material)
same as received
Mass median aerodynamic diameter:
88.9 µm
Geometric standard deviation:
12.8
Key result
Percentile:
D50
Mean:
72.2 µm
St. dev.:
10.422
No.:
#5
Size:
< 250 µm
Distribution:
87.04 %
No.:
#4
Size:
250 µm
Distribution:
12.73 %
No.:
#3
Size:
500 µm
Distribution:
0.13 %
No.:
#2
Size:
1 000 µm
Distribution:
0.07 %
No.:
#1
Size:
2 000 µm
Distribution:
0.04 %
Conclusions:
Using the sieving and the laser diffraction method to study the particle size of MG-60 ranging, the mass median diameter (MMD) was determiend to be 72.2 µm. The particle size distribution was found to range from approximately 0.5 µm to 500 µm

Description of key information

The particle size distribution was found to range from approximately 0.5 µm to 500 µm

Additional information