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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:
2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Guideline compliant study with good documentation
Qualifier:
according to
Guideline:
other: DIN 66165 April 1987
Principles of method if other than guideline:
A representative part of the test item is given to a sieve tower and classified by means of a hand or machine sieving. From the weighted sieve fractions the particle size distributions and the frequency scale are determined.
GLP compliance:
no
Type of method:
sieving
Type of distribution:
mass based distribution
Percentile:
D10
Mean:
781 µm
Remarks on result:
other: In the gain fraction > 1400 µm are particle up to a size of 7.5 cm x 2.5 cm.(migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.)
Key result
Percentile:
D50
Mean:
> 1 400 µm
Remarks on result:
other: In the gain fraction > 1400 µm are particle up to a size of 7.5 cm x 2.5 cm.(migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.)
Percentile:
D90
Mean:
> 1 400 µm
Remarks on result:
other: In the gain fraction > 1400 µm are particle up to a size of 7.5 cm x 2.5 cm.

 Table 1 Partile size distribution

Grain fraction

Percent by weight

Frequency density

Cumulative (%)

(µm)

(g)

(%)

q3         (%/µm)

Q3 (D)

1-Q3 (R)

< 63

0,70

0,6

0,010

0,6

99,4

63 – 125

1,35

1,2

0,019

1,8

98,2

125 – 250

2,08

1,8

0,015

3,6

96,4

250 – 500

3,48

3,1

0,012

6,7

93,3

500 – 1000

6,67

5,9

0,012

12,6

87,4

1000 – 1400

4,83

4,3

0,011

16,8

83,2

> 1400

94,53

83,2

0,006

100,0

0,0

 

X10:     781 µm

X50: > 1400 µm

X90: > 1400 µm

                    

In the gain fraction > 1400 µm are particle up to a size of 7.5 cm x 2.5 cm.

Conclusions:
The mean particle size (D50) is > 1400 µm. The D10 is 781 µm. In the gain fraction > 1400 µm are particle up to a size of 7.5 cm x 2.5 cm.
Executive summary:

In the Klimisch 1 study from Bütfering (2012) the particle size distribution of Sodium dicyclohexyl sulfosuccinate was determined according to DIN 66165.A representative part of the test item was given to a sieve tower and classified by means of a hand or machine sieving. From the weighted sieve fractions the particle size distributions and the frequency scale were determined. The mean particle size (D50) is > 1400 µm. The D10 is 781 µm. In the gain fraction > 1400 µm are particle up to a size of 7.5 cm x 2.5 cm.

The results of this study are considered reliable and relevant for the risk assessment.

Description of key information

mean particle size (D50): > 1400 µm

Additional information

In the Klimisch 1 study from Bütfering (2012) the particle size distribution of Sodium dicyclohexyl sulfosuccinate was determined according to DIN 66165.A representative part of the test item was given to a sieve tower and classified by means of a hand or machine sieving. From the weighted sieve fractions the particle size distributions and the frequency scale were determined. The mean particle size (D50) is > 1400 µm. The D10 is 781 µm. In the gain fraction > 1400 µm are particle up to a size of 7.5 cm x 2.5 cm.

The results of this study are considered reliable and relevant for the risk assessment.