Disodium 2,5-dichloro-4-[4-[[5-[[(dodecyloxy)carbonyl]amino]-2-sulphonatophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonate

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:

From December 20th, 2017 to January 02nd, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 59, “Dry Sieve test”

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

sieving

Type of particle tested:

primary particle

Type of distribution:

mass based distribution

Specific details on test material used for the study:

The test item was used in its initial form, without any pre-treatment.

Percentile:

D50

Mean:

420 - 850 µm

Remarks on result:

other: 90.05 % of particles have a size higher than 105 µm

Determination of particle size distribution

Sieve size (µm)	Weight of test item (g)	Material passed through sieve		Residue (Rx) %
		dx, g	Percentage ( %)
2812	10.0054	9.1778	91.73	8.27
850	10.0533	6.8761	68.4	31.6
420	10.0124	4.753	47.47	52.53
150	10.0203	1.2976	12.95	87.05
105	10.0015	0.9954	9.95	90.05

Conclusions:

D50: 420 - 850 µm

Executive summary:

The dry sieve test of test item was determined as per CIPAC MT 59, “Dry Sieve test”. The dry sieve test with the test item was carried out in single replicate.

The sieve with 105 µm size retained more than 90 % of the total test item particles; the sieve with 2812 µm size retained less than 10 % of the particles. The median of particle size (D50) resulted to be between 420 and 850 µm.

Conlcusion

D50: 420 - 850 µm

Description of key information

D50: 420 - 850 µm

Additional information

CIPAC MT 59 - Dry sieve test