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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:
2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Deviations:
no
GLP compliance:
yes
Type of method:
sedimentation (gravitational settling)
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: Batch 20180329 (Source Lead)
- Expiration date of the lot/batch: March 2019
- Purity test date: March 2018

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: romm temperature 20 +/-10°C in darkness
- Stability under test conditions: stable
No.:
#1
Size:
ca. 710 µm
Distribution:
ca. 1.1 %
No.:
#2
Size:
ca. 500 µm
Distribution:
ca. 0.1 %
No.:
#3
Size:
ca. 355 µm
Distribution:
ca. 0.1 %
No.:
#4
Size:
ca. 250 µm
Distribution:
ca. 0.1 %
No.:
#5
Size:
ca. 180 µm
Distribution:
ca. 0.3 %
No.:
#6
Size:
ca. 125 µm
Distribution:
ca. 5.3 %
No.:
#7
Size:
ca. 90 µm
Distribution:
ca. 39.6 %
No.:
#8
Size:
ca. 63 µm
Distribution:
ca. 38.7 %
No.:
#9
Size:
ca. 45 µm
Distribution:
ca. 14 %
No.:
#10
Size:
ca. 32 µm
Distribution:
ca. 0.8 %
No.:
#10
Size:
ca. 25 µm
Distribution:
ca. 0 %

Table : principal Sieving

Relative humidity : from 54.2% to 57.7%

Temperature : from 21.1°C to 22.4°C

Mass of test item used : 19.94 g

Test sieve  Mass of residue (g)  Percentage of residue (%)  Cumulated undersized particles (%)  Time of mechanical sieving (min)  Time of manual sieving (min) 
 710 µm 0.21  1.1  98.8  30 
 500 µm 0.01  0.1  98.8  30 
 355 µm 0.02  0.1  98.7  30 
 250 µm 0.01  0.1  98.6  30 
 180 µm 0.05  0.3  98.4  30 
 125 µm 1.04  5.3  93.1  30 
 90 µm 7.78  39.6  53.4  30  14 
 63 µm 7.60  38.7  14.7  30 
 45 µm 2.74  14.0  0.8  30 
 32 µm 0.15  0.8  0.0  30 
 25 µm 0.00  0.0  0.0  30 
 Receiver pan 0.00  0.0  0.0  30 

The loss of mass was 1.7%

Conclusions:
After the preliminary test, it was shown that the majority of the particles (99.9%) was between the receiver pan and 1 mm. So, the principal sieving was made lower than 1 mm.
After the main test, it was shown that the majority of the particles (92.3%) was between 45 μm and 125 μm.
Executive summary:

In compliance with OECD Guideline n°110, it was shown, for 4 -phnexyphenol, that the majority of the particles size (92.3%) was between 45 μm and 125 μm and the D50 is c.a. 90 µm.

Description of key information

On the basis of OECD Test n°110, the majority of the particles size (92.3%) was between 45 μm and 125 μm and the D50 is c.a. 90 µm.

Additional information