2,9,16,23-tetrakis(2,5-di-tert-butyl-4-methoxyphenoxy)phthalocyanine

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:

11th March 2020 - 26th March 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Qualifier:

equivalent or similar to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Qualifier:

equivalent or similar to guideline

Guideline:

other: CIPAC MT 187

Version / remarks:

Particle Size Analysis by Laser Diffraction, Handbook K. 2007

GLP compliance:

yes

Type of method:

Laser scattering/diffraction

Remarks:

Laser Diffraction Analysis, using the medium volume (wet) module (MVM

Type of particle tested:

primary particle

Type of distribution:

volumetric distribution

Specific details on test material used for the study:

Batch (Lot) Number: 2715/18/01
Expiry date: 01 July 2020 (expiry date)
Physical Description: Dark green solid
Purity/Composition: 99%
Storage Conditions: At room temperature protected from light

Additional information
Test Facility test item number: 210026/A
Purity/Composition correction factor: No correction factor required
Test item handling: Use amber glassware or wrap container in aluminum foil

Mass median aerodynamic diameter:

ca. 67.1 µm

Geometric standard deviation:

>= 5.733 - <= 5.885

Percentile:

D10

Mean:

ca. 7.59 µm

St. dev.:

0.144

Key result

Percentile:

D50

Mean:

ca. 63.4 µm

St. dev.:

1.35

Percentile:

D90

Mean:

ca. 1 560 µm

St. dev.:

50.3

Test results

	Run 1	Run 2	Run 3	Run 4	Run 5	Mean	STDVP	%STDVP
Volume weighted mean	319	329	343	318	334	329	10.5	3.21
Mode	88.1	86.4	84.2	86.8	88.5	86.8	1.69	1.94
d10 (10% of material is <)	7.42	7.71	7.77	7.51	7.55	7.59	0.144	1.89
d50 (50% of material is <)	61.6	64.8	64.7	63.0	63.0	63.4	1.35	2.13
d90 (90% of material is <)	1540	1530	1620	1490	1590	1560	50.3	3.23
GSD	5.749	5.791	5.885	5.733	5.858	5.803	0.067	1.149
MMAD	67.10

Definitions

GSD                           geometric standard deviation of the lognormal particle size distribution
MMAD                      mass median aerodynamic diameter
Mean                          Calculated from the entirety of the data captured in each run and not a simple arithmetic mean
STDVP                      standard deviation of the population
%STDVP                   percentage standard deviation of the population

Conclusions:

The particle size distribution of the test item was determined by means of Laser Diffraction Analysis using the medium volume (wet) module (MVM). The D50 of the test item was determined to be 63.4 µm, the D10 was 7.59 µm and the D90 was 1560 µm.
The MMAD of the test item, for the relative density and the mean D50, was calculated to be 67.10 µm.

Executive summary:

The objective of this study was to determine the particle size distribution of 2,9,16,23-tetrakis(2,5-di-tert-butyl-4-methoxyphenoxy)phthalocyanine. The test was conducted to determine the particle size distribution of 2,9,16,23-tetrakis (2,5-di-tert-butyl-4-methoxyphenoxy)phthalocyanineby means of Laser Diffraction Analysis,using the medium volume (wet) module (MVM). A most suitable dispersant for the laser diffraction analysis would be a liquid in which the solubility of the test item is less than 50 mg/L and in which the test item is well and homogeneously dispersed. In order to facilitate adequate dispersion, the samples were shaken and, if needed, ultrasonication was applied as well. Once suitable dispersion parameters are identified, a final sample was analysed using the Malvern Mastersizer 3000 Laser Diffraction Analyser. Five runs were conducted to ensure repeatability of results. Dispersability is interpreted based on visual observation, such as homogeneity, tendency to agglomerate formation, floating on the surface or settling speed.

The D50 of the test item was determined to be 63.4 µm, the D10 was 7.59 µm and the D90 was 1560 µm. The MMAD of the test item, for the relative density and the mean D50, was calculated to be 67.10 µm.

Description of key information

The D50 of the test item was determined to be 63.4 µm, the D10 was 7.59 µm and the D90 was 1560 µm. The MMAD of the test item, for the relative density and the mean D50, was calculated to be 67.10 µm.