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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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study was conducted according to guideline CIPAC method 187 and ISO 13320-1. It was not carried out according to GLP, but it was performed in a test facility which has been certified to be in compliance with the principles of GLP.
Qualifier:
according to
Guideline:
other: CIPAC method 187 and ISO 13320-1
Deviations:
no
GLP compliance:
no
Remarks:
GLP compliant facility
Type of method:
Laser scattering/diffraction
Type of distribution:
other: Laser Diffraction
Percentile:
D50
Mean:
40.8 µm
Remarks on result:
other: Relative standard deviation 1.25%(migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.)
Percentile:
D10
Mean:
14 µm
St. dev.:
2.93
Remarks on result:
other: SD (%)
Percentile:
D90
Mean:
84.1 µm
St. dev.:
3.12
Remarks on result:
other: SD (%)

The results have been summarised in the table below.

 

Determination

Median / µm

Percent undersize d(10) / µm

Percent undersize d(90) / µm

1st

40.929

14.241

84.067

2nd

41.270

13.577

86.760

3rd

40.264

14.330

81.512

 

 

 

 

average

40.8

14.0

84.1

relative standard deviation [ % ]

1.25

2.93

3.12

 

The final average values for the determination have been quoted correct to three significant figures.

Conclusions:
The median particle size of the test substance is 40.8µm Standard Deviation 1.25%

Description of key information

D50= 40.8 µm(S.D. 1.25%)

D10= 14.0 µm(S.D.2.93%)
D90= 84.1 µm(S.D: 3.12%)

CIPAC Method 187, laser scattering/diffraction, Das 2011

Additional information

Only a single study conducted according to guidelines is available for this endpoint. The study is considered to be relevant, reliable (Klimisch 2) and adequate for the purposes of risk assessment, classification and labelling.