Tetrakis(phenylmethyl)thioperoxydi(carbothioamide)

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:

2021

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions)

Deviations:

no

GLP compliance:

no

Other quality assurance:

ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)

Type of method:

Laser scattering/diffraction

Type of particle tested:

aggregate

Type of distribution:

volumetric distribution

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source (i.e. manufacturer or supplier) and lot/batch number of test material: MLPC batch grad C 21022443262 & 21022443263 & 21022443264 & 21022443265 &21022443266
- melting point :respectively 131.1 & 131.8 & 131.4 & 130.7 & 131.0°C
- purity by HPLC : 96.8% -96.9- 96.9-96.9 -96.8%

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: 2 years

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing (e.g. warming, grinding): addition of 0.05g of NP6 for 0.5g of TbzTD C

FORM AS APPLIED IN THE TEST (if different from that of starting material)
- Specify the relevant form characteristics if different from those in the starting material, such as state of aggregation, shape of particles or particle size distribution: no

Key result

Percentile:

D10

Mean:

ca. 4.25 µm

St. dev.:

0.764

Key result

Percentile:

D50

Mean:

22.279 µm

St. dev.:

3.854

No.:

#3

Size:

< 30 µm

Distribution:

70 - 85 %

No.:

#2

Size:

< 20 µm

Distribution:

51 - 73 %

No.:

#1

Size:

< 10 µm

Distribution:

30 - 45 %

Mean values are listed in the table below. Variations due to repeatability are in the same order that these ones mentioned by ISO 13320-1 (3%).

	% below 10µm	% below 20µm	% below 30µm	D0.1	D(3.3)
21022443262	33.77	60.8	72.74	4.94	24.765
21022443263	30.43	51.27	70.56	4.038	26.464
21022443264	32.24	57.54	72	4.895	23.608
21022443265	38.99	66.44	80.65	4.306	19.273
21022443266	47.05	73.21	85.08	3.07	17.287
Medium value	36.496	61.852	76.206	4.250	22.279
St deviation	6.707	8.392	6.326	0.764	3.854

Conclusions:

The mean particle size, number in volume, of TbzTD test item, is determined to be about 22 µm, with about 30-45% of particles presenting a diameter less than 10µm.

Executive summary:

A study was performed at Laboratoire Qualité & Soutien Exploitation de MLPC International to investigate the particle size distribution (granulometry) on 3 batchs of the test substance EKALAND ZBEC. The study was conducted according to ISO 13320- 1 “International standard for Laser Diffraction Measurements – Principles of Laser diffraction” and in accordance with OECD Test Guideline 110. The mean particle size, number in volume, of tbzTd test item, is determined to be 22 µm, with about 30-45% of particles presenting a diameter less than 10µm.

Description of key information

A study was performed at Laboratoire Qualité & Soutien Exploitation de MLPC International to investigate the particle size distribution (granulometry) on 3 batchs of the test substance EKALAND ZBEC. The study was conducted according to ISO 13320- 1 “International standard for Laser Diffraction Measurements – Principles of Laser diffraction” and in accordance with OECD Test Guideline 110. The mean particle size, number in volume, of tbzTd test item, is determined to be 22 µm, with about 30-45% of particles presenting a diameter less than 10µm.