C.I. Solvent Red 119

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

May 2017 - December 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2020

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Deviations:

not applicable

Remarks:

The analysis has not yet been performed.

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: CIPAC 187

Deviations:

not applicable

Remarks:

The analysis has not yet been performed.

Test guideline 3

Qualifier:

according to guideline

Guideline:

other: OECD 110

Deviations:

not applicable

Remarks:

The analysis has not yet been performed.

GLP compliance:

yes (incl. QA statement)

Type of method:

Laser scattering/diffraction

Test material

Test material information

Constituent 1

Reference substance name:

C.I. Solvent Red 119

EC Number:

602-676-8

Cas Number:

12237-27-3

Molecular formula:

C32H22N10O8Cr

IUPAC Name:

C.I. Solvent Red 119

impurity 1

Reference substance name:

Unknown impurities

Cas Number:

not available

IUPAC Name:

Unknown impurities

impurity 2

Reference substance name:

Water

EC Number:

231-791-2

EC Name:

Water

Cas Number:

7732-18-5

Molecular formula:

H2O

IUPAC Name:

water

Test material form:

solid: particulate/powder

Results and discussion

Particle size distribution at different passages

Particle size distribution at different passages 1

No.:

#1

Size:

6.01 µm

Distribution:

50 %

Particle size distribution at different passages 2

No.:

#2

Size:

0.72 µm

Distribution:

10 %

Particle size distribution at different passages 3

No.:

#3

Size:

45 µm

Distribution:

90 %

Applicant's summary and conclusion

Conclusions:

The median particle size L50 of the test item deduced from the particle size distributions was
6.01 µm.
The particle size L10 of the test item deduced from the particle size distributions was
0.72 µm.
The particle size L90 of the test item deduced from the particle size distributions was
45.0 µm.

Executive summary:

The test item consisted of irregular shaped particles which were partially agglomerated.

The particles were introduced to the analyser beam by the dry powder feeder by direct spraying through the measurement area. The powder was loosened by an integrated vibrator. The particles were dispersed and fed to the optical system by pressurized dry air (1.5 bar_g). After passing the analyser beam the sample was collected in a vacuum cleaner.

After adjusting the laser, measuring the background and adjusting the correct particle concentration (obscuration) the measurement was started. The control software automatically performed three measurements. The average of these three measurements was given as result. Two test series of three measurements each were performed. The measurement time was 8 s.

The particle size distributions determined in the first and second test series are shown inFigure1(page7) andFigure2(page8), respectively. For each test series fractions (left axis of the ordinate) and the siftings (right axis of the ordinate) are presented in percent by volume as a function of the particle size.Median values were calculated from unrounded values.

The median particle size L₅₀(D (v, 0.5): 50 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1^sttest series:L₅₀ = 6.191 µm

2^ndtest series:           L₅₀ = 5.822 µm

The average of the median particle size L₅₀was:

L₅₀= 6.01µm

The particle size L₁₀(D (v, 0.1): 10 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1^sttest series:L₁₀ = 0.720 µm

2^ndtest series:           L₁₀ = 0.712 µm

The average of the particle size L₁₀was:

L₁₀= 0.72 µm

The particle size L₉₀(D (v, 0.9): 90 % of particle volume or particle mass with lower particle diameter) deduced from these distributions were:

1^sttest series:L₉₀ = 46.985 µm

2^ndtest series:           L₉₀ = 43.104 µm

The average of the particle size L₉₀was:

L₉₀= 45.0 µm

The particle size distribution showed a multi-modal distribution. Maxima were observed at approx. 1 µm and 8 µm. Shoulders were observed at approx. 40 µm and 200 µm.