Reaction mass of 3,4,5-trichlorophthalic acid, strontium salt and 3,4,6-trichlorophthalic acid, strontium salt and 3,4-dichlorophthalic acid, strontium salt and 3,5-dichlorophthalic acid, strontium salt and 3,6-dichlorophthalic acid, strontium salt and 3-chlorophthalic acid, strontium salt and 4,5-dichlorophthalic acid, strontium salt and 4-chlorophthalic acid, strontium salt

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:

2019-09-10 to 2019-10-30

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)

GLP compliance:

no

Type of method:

Laser scattering/diffraction

Type of particle tested:

primary particle

Type of distribution:

volumetric distribution

Key result

Percentile:

D10

Mean:

1.86 µm

St. dev.:

0.03

Remarks on result:

other: Mean of three measurements

Key result

Percentile:

other: D16

Mean:

2.68 µm

St. dev.:

0.04

Remarks on result:

other: Mean of three measurements

Key result

Percentile:

D50

Mean:

8.81 µm

St. dev.:

0.29

Remarks on result:

other: Mean of three measurements

Key result

Percentile:

other: D84

Mean:

219.46 µm

St. dev.:

7.33

Remarks on result:

other: Mean of three measurements

Key result

Percentile:

D90

Mean:

304.33 µm

St. dev.:

4.69

Remarks on result:

other: Mean of three measurements

Table 1: Particle size of certified reference standard (silicon carbide)

	D10/ µm	D16/ µm	D50/ µm	D84/ µm	D90/ µm
max.	16.06	17.87	26.24	37.81	41.50
average	15.59	17.35	25.60	36.35	39.91
min.	15.12	16.83	24.96	34.90	38.31

The results of each determination of the particle size distribution of the test item are summarized in Table 2.

Table 2: Determination of the particle size distribution of the test item

Distribution Sums by Percentages	Particle Size	Particle Size	Particle Size	Particle Size
Di/ [%]	test 1 / [µm]	test 2 / [µm]	test 3 / [µm]	mean / [µm]
D10	1.89	1.84	1.85	1.86 ± 0.03
D16	2.73	2.65	2.66	2.68 ± 0.04
D50	9.14	8.61	8.69	8.81 ± 0.29
D84	226.34	211.74	220.29	219.46 ± 7.33
D90	308.79	299.43	304.78	304.33 ± 4.69

The particle size of the test item is bimodally distributed. The mean distribution density graph shows local maxima at ca. 7 µm and 350 µm.

Conclusions:

The particle size distribution of the test item was determined by laser diffraction:
- Mean of the particle size D10: 1.86 ± 0.03 µm
- Mean of the particle size D16: 2.68 ± 0.04 µm
- Mean of the particle size D50: 8.81 ± 0.29 µm
- Mean of the particle size D84: 219.46 ± 7.33 µm
- Mean of the particle size D90: 304.33 ± 4.69 µm

Executive summary:

The particle size distribution of the test item was determined by laser diffraction according to OECD Guideline 110. The mean values of the particle size distribution of the test item out of three determinations are presented below:

- Mean of the particle size D10: 1.86 ± 0.03 µm

- Mean of the particle size D16: 2.68 ± 0.04 µm  

- Mean of the particle size D50: 8.81 ± 0.29 µm

- Mean of the particle size D84: 219.46 ± 7.33 µm

- Mean of the particle size D90: 304.33 ± 4.69 µm  

Description of key information

The particle size distribution of the test item was determined by laser diffraction according to OECD Guideline 110. The mean values of the particle size distribution of the test item out of three determinations are presented below:

Mean of the particle size D10: 1.86 ± 0.03 µm

Mean of the particle size D16: 2.68 ± 0.04 µm  

Mean of the particle size D50: 8.81 ± 0.29 µm

Mean of the particle size D84: 219.46 ± 7.33 µm

Mean of the particle size D90: 304.33 ± 4.69 µm