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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:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: CIPAC MT 170 (1994) Dry Sieve Analysis of Water Dispersive Granules
Principles of method if other than guideline:
The sieve analysis consists of the quantitative separation of water dispersible granules into fractions of different particle size ranges by using a hand sieving method.
GLP compliance:
yes (incl. QA statement)
Type of method:
other: dry sieve analysis
Type of particle tested:
primary particle
Type of distribution:
other: mass distribution: hand sieving
Percentile:
other: D97
Mean:
ca. 125 µm
Remarks on result:
other: St.dev not available
No.:
#6
Size:
125 µm
Distribution:
97.6 %
No.:
#5
Size:
100 µm
Distribution:
98.2 %
No.:
#4
Size:
75 µm
Distribution:
98.8 %
No.:
#3
Size:
50 µm
Distribution:
98.8 %
No.:
#2
Size:
25 µm
Distribution:
99.4 %
No.:
#1
Size:
11 µm
Distribution:
100 %

Distribution = Residue (% m/m)


The tap density (according to CIPAC MT 169) of Reaction product of 2-hydroxybenzoic acid, styrene and oxozinc was determined as 0.83 g/mL ( = g/cm3).


The mass of the sample needed for the main test (m) was calculated to 99.6 g (16.6 g/sieve).


The particle size distribution of the test item was specified by the range [x1, x2] of two sieves, Rx >= 90 % and Rx <= 10 % is estimated. This range covers 80% or more of the particle size of the test item.

Conclusions:
More than 80 % of the test item was found to be bigger than 125 μm. No particles with a diameter below 11 μm were found.
As only residues > 90% were determined, the range of the sieves with 10% < Rx < 90% could not be determined.
No observations were made which have cause doubts concerning the validity of the study outcome.
Executive summary:

The particle size distribution of Reaction product of 2-hydroxybenzoic acid, styrene and oxozinc was performed according to CIPAC MT 170. Six sieves of different mesh sizes were used. Based on dry sieve analysis of the test item Reaction product of 2-hydroxybenzoic acid, styrene and oxozinc, more than 80 % of the test item was found to be bigger than 125 μm. No particles with a diameter below 11 μm were found. As only residues > 90% were determined, the range of the sieves with 10% < Rx < 90% could not be determined. No observations were made which have cause doubts concerning the validity of the study outcome.

Description of key information

The particle size distribution of Reaction product of 2-hydroxybenzoic acid, styrene and oxozinc was performed according to CIPAC MT 170. Six sieves of different mesh sizes were used. Based on dry sieve analysis of the test item Reaction product of 2-hydroxybenzoic acid, styrene and oxozinc, more than 80 % of the test item was found to be bigger than 125 μm. No particles with a diameter below 11 μm were found. As only residues > 90% were determined, the range of the sieves with 10% < Rx < 90% could not be determined. No observations were made which have cause doubts concerning the validity of the study outcome.

Additional information