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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:
9.11.1990 to 20.11.1990
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
This study could not be performed in accordance with the OECD Guideline for Testing of Chemicals No. 110 "Particle Size Distribution/Fibre Length and Diameter Distributions". It was performed by the sieving method.
GLP compliance:
yes
Type of method:
sieving
Type of distribution:
mass based distribution
Specific details on test material used for the study:
Name: FAT 40406/A
Purity: 89.3%
Storage condition of test material: Room temperature, 20 - 24 °C
Mass median aerodynamic diameter:
56 µm
Percentile:
D50
Mean:
56 µm
Remarks on result:
other: st. dev not available
No.:
#1
Size:
400 µm
Distribution:
0.3 %
No.:
#2
Size:
200 µm
Distribution:
3 %
No.:
#3
Size:
100 µm
Distribution:
26 %
No.:
#4
Size:
63 µm
Distribution:
46 %
No.:
#5
Size:
40 µm
Distribution:
60 %
No.:
#6
Size:
20 µm
Distribution:
98 %

Particle shape (qualitatively): platelets

The test substance contains a few large particles. Depending on whether some lumps come into the sieving sample or not, the results of subsequent siftings scatter considerably. For this reason, the average of all siftings is taken as the final result.

The substance adsorbs water (ca. 11%) under normal laboratory conditions. Therefore, the substance was exposed to the laboratory atmosphere for 2 hours prior to the sieving analysis.

Conclusions:
The median of mass distribution of the test substance was determined to be 56 µm.
Executive summary:

In a GLP compliant study, the mass median diameter of the FAT 40406/A was determined in triplicate. The test was performed on an Alpine luftstrahlsieb using the sieving method. The median of mass distribution (MMD) of the test substance was determined to be 56 µm.

Description of key information

The median of mass distribution of Reactive Red 245 was determined to be 56 µm.

Additional information

In a GLP compliant study, the mass median diameter of the test substance was determined in triplicate.The test was performed on an Alpine luftstrahlsieb using the sieving method. The median of mass distribution (MMD) of the test substance was determined to be 56 µm.

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