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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:
10 July 1984 to 31 July 1984
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: As per light diffraction method
Deviations:
not specified
Principles of method if other than guideline:
light diffraction
The test substance could not be analysed in accordance with the OECD Guideline for Testing of Chemicals No. 110 "Particle Size Distribution/
Fibre Length and Diameter Distributions" because it is soluble in water
GLP compliance:
yes
Type of method:
other: Light diffraction
Type of particle tested:
other: powder
Type of distribution:
mass based distribution
Specific details on test material used for the study:
Product: Monoazo Yellow HT 2025
Identification: FAT 20'306/B
room temperature, 20 - 24 °C
Percentile:
D50
Mean:
22.9 µm
Remarks on result:
other: No source field for Standard deviation.
No.:
#1
Size:
1 µm
Distribution:
0.2 %
No.:
#2
Size:
3 µm
Distribution:
1.4 %
No.:
#3
Size:
4 µm
Distribution:
0.3 %
No.:
#4
Size:
6 µm
Distribution:
0.1 %
No.:
#5
Size:
12 µm
Distribution:
4.3 %
No.:
#6
Size:
16 µm
Distribution:
13.7 %
No.:
#7
Size:
24 µm
Distribution:
34.2 %
No.:
#8
Size:
32 µm
Distribution:
23.3 %
No.:
#9
Size:
48 µm
Distribution:
21 %
No.:
#10
Size:
64 µm
Distribution:
0.6 %

Particle shape (qualitatively): spheres


Suspension medium: Sangajol (White Spirit)


Temperature: 22 °C


Particle concentration: 0.5 -1 kg/m³


Median of mass distribution (diameter): 22.9 µm


Percent mass above 400 urn diameter: 0 %


Percent mass below 4 μm diameter: 2.1 %

Conclusions:
Median of mass distribution (diameter) of FAT 20306/B was 22.9 μm.
Executive summary:

A particle size determination test with FAT 20306/B was carried out using the method of light diffraction (granulometer model 715), based on test results the median of mass distribution (diameter) of the test material is 22.9 μm.

Description of key information

Particle size determination test with FAT 20306/B was carried out using the method of light diffraction (granulometer model 715), based on test results the median of mass distribution (diameter) of the test material is 22.9 μm.

Additional information

The test substance could not be analysed in accordance with the OECD Guideline for Testing of Chemicals No. 110 "Particle Size Distribution/Fibre Length and Diameter Distributions" due to its solubility in water.