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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:
04 August 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Justification for type of information:
Study performed to recognised standard in compliance with GLP.
Qualifier:
equivalent or similar to
Guideline:
other: CIPAC method MT 59 “Sieve Analysis”, CIPAC Handbook Volume F, Physico-Chemical Methods for Technical and Formulated Pesticides, 1995.
Version / remarks:
CIPAC method MT 59 “Sieve Analysis”, CIPAC Handbook Volume F, Physico-Chemical Methods for Technical and Formulated Pesticides, 1995.
Deviations:
no
Remarks:
See below
Principles of method if other than guideline:
CIPAC method MT 59 “Sieve Analysis”, CIPAC Handbook Volume F, Physico-Chemical Methods for Technical and Formulated Pesticides, 1995.
GLP compliance:
yes (incl. certificate)
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Mass median aerodynamic diameter:
>= 2 000 µm
Remarks on result:
other:
Remarks:
Not inhalable.
No.:
#1
Size:
< 100 µm
Distribution:
0.3 %
Remarks on result:
other:
Remarks:
Not inhalable.
No.:
#2
Size:
> 100 - <= 180 µm
Distribution:
0.3 %
Remarks on result:
other:
Remarks:
Not inhalable.
No.:
#3
Size:
> 180 - <= 250 µm
Distribution:
0.2 %
Remarks on result:
other:
Remarks:
Not inhalable.
No.:
#4
Size:
>= 250 - <= 500 µm
Distribution:
0.3 %
Remarks on result:
other:
Remarks:
Not inhalable.
No.:
#5
Size:
>= 500 - <= 1 000 µm
Distribution:
0.2 %
Remarks on result:
other:
Remarks:
Not inhalable.
No.:
#6
Size:
>= 1 000 - <= 2 000 µm
Distribution:
0.5 %
Remarks on result:
other:
Remarks:
Not inhalable.
No.:
#7
Size:
> 2 000 µm
Distribution:
98.3 %
Remarks on result:
other:
Remarks:
Not inhalable.

The particle size distribution of 2,2-Bis[[3-(dodecylthio)-1-oxopropoxy]methyl]propane-1,3-diyl bis[3-(dodecylthio)propionate] was determined by sieving. The results are given in the table. In the receiver pan (i.e. the fraction < 100 μm), 0.3% test item was collected.

 

Fraction

Amount [%]

<100 μm

0.3

100 – 180 μm

0.3

180 – 250 μm

0.2

250 – 500 μm

0.3

500 – 1000 μm

0.2

1000 – 2000 μm

0.5

>2000 μm

98.3

 

Conclusions:
In the receiver pan (i.e. the fraction < 100 μm), 0.3% test item was collected.
Executive summary:

The purpose of the study was to obtain a quantitative determination of the particle size distribution of the test item.

The method is based on the determination of the fractions test item of different particle size, obtained by leading a sample through a sequence of sieves with different mesh sizes.

The interval of the mesh size in which at least 80% of the test item is collected will be determined.

 

Guidelines:

CIPAC method MT 59 “Sieve Analysis”, CIPAC Handbook Volume F, Physico-Chemical Methods for

Technical and Formulated Pesticides, 1995.

 

The particle size distribution of 2,2-Bis[[3-(dodecylthio)-1-oxopropoxy]methyl]propane-1,3-diyl bis[3-(dodecylthio)propionate] was determined by sieving. The results are given in the table. In the receiver pan (i.e. the fraction < 100 μm), 0.3% test item was collected.

 

Fraction

Amount [%]

<100 μm

0.3

100 – 180 μm

0.3

180 – 250 μm

0.2

250 – 500 μm

0.3

500 – 1000 μm

0.2

1000 – 2000 μm

0.5

>2000 μm

98.3

 

Description of key information

In the receiver pan (i.e. the fraction < 100 μm), 0.3% test item was collected.

Additional information

The purpose of the study was to obtain a quantitative determination of the particle size distribution of the test item.

The method is based on the determination of the fractions test item of different particle size, obtained by leading a sample through a sequence of sieves with different mesh sizes.

The interval of the mesh size in which at least 80% of the test item is collected will be determined.

 

The particle size distribution of 2,2-Bis[[3-(dodecylthio)-1-oxopropoxy]methyl]propane-1,3-diyl bis[3-(dodecylthio)propionate] was determined by sieving. The results are given in the table. In the receiver pan (i.e. the fraction < 100 μm), 0.3% test item was collected.

 

Fraction

Amount [%]

<100 μm

0.3

100 – 180 μm

0.3

180 – 250 μm

0.2

250 – 500 μm

0.3

500 – 1000 μm

0.2

1000 – 2000 μm

0.5

>2000 μm

98.3