Phthalaldehyde

Particle size distribution (Granulometry)

Link to relevant study record(s)

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-01-31 to 2018-05-17

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)

Qualifier:

according to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 187: Particle Size Analysis by Laser Diffraction

GLP compliance:

no

Type of method:

Laser scattering/diffraction

Type of particle tested:

primary particle

Type of distribution:

volumetric distribution

Specific details on test material used for the study:

The test item was sieved with a mesh size of 1000 µm. 67.9% (w/w) of the test item passed the sieve and only this fraction was measured with laser diffraction.

Percentile:

D50

Mean:

842.3 µm

St. dev.:

18.6

Percentile:

D10

Mean:

463.6 µm

St. dev.:

13.8

Percentile:

D90

Mean:

1 453.9 µm

St. dev.:

15.9

The test item consisted of crystalline particles which appeared transparent and oval with an irregular surface. The test item was sieved with a mesh size of 1000 µm. 67.9% (w/w) of the test item passed the sieve and only this fraction was measured with laser diffraction.

Median particle size D (v, 0.5): 50% of particle volume or particle mass with lower particle diameter

1st test series: 845.0 µm

2nd test series: 839.7 µm

Average of the median particle size: 842.3 µm (standard deviation: 18.6 µm)

Particle size D (v, 0.1): 10% of particle volume or particle mass with lower particle diameter

1st test series: 465.4 µm

2nd test series: 461.8 µm

Average of the particle size: 463.6 µm (standard deviation: 13.8 µm)

Particle size D (v, 0.9): 90% of particle volume or particle mass with lower particle diameter

1st test series: 1456.1 µm

2nd test series: 1451.7 µm

Average of the particle size: 1453.9 µm (standard deviation: 15.9 µm)

The particle size distribution showed a monomodal distribution. The maximum was observed at approximately 850 µm.

Conclusions:

The particle size distribution of the test item was determined by laser diffraction (light scattering):
D (v, 0.5): 842.3 µm ± 18.6 µm;
D (v, 0.1): 463.6 µm ± 13.8 µm;
D (v, 0.9): 1453.9 µm ± 15.9 µm.

Executive summary:

The particle size distribution of the test item was determined by laser diffraction (light scattering). The test item consisted of crystalline particles which appeared transparent and oval with an irregular surface.The test item was sieved with a mesh size of 1000 µm. 67.9% (w/w) of the test item passed the sieve and only this fraction was measured with laser diffraction.

D (v, 0.5): 842.3 µm ± 18.6 µm;

D (v, 0.1): 463.6 µm ± 13.8 µm;

D (v, 0.9): 1453.9 µm ± 15.9 µm.

Description of key information

The particle size distribution of the test item was determined by laser diffraction (light scattering).

D (v, 0.5): 842.3 µm ± 18.6 µm;

D (v, 0.1): 463.6 µm ± 13.8 µm;

D (v, 0.9): 1453.9 µm ± 15.9 µm.

Additional information

The test item consisted of crystalline particles which appeared transparent and oval with an irregular surface. The test item was sieved with a mesh size of 1000 µm. 67.9 % (w/w) of the test item passed the sieve and only this fraction was measured with laser diffraction.