1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

10 mar - 15 mar 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions) - Method B: Fibre Length and Diameter Distributions

Test guideline 2

Qualifier:

according to guideline

Guideline:

ISO 13320 (Particle size analysis - Laser diffraction methods)

Test guideline 3

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 187: Particle Size Analysis by Laser Diffraction

GLP compliance:

no

Type of method:

Laser scattering/diffraction

Type of particle tested:

agglomerate

Type of distribution:

volumetric distribution

Test material

Test material information

Constituent 1

Reference substance name:

1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone

EC Number:

270-931-7

EC Name:

1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone

Cas Number:

68510-93-0

Molecular formula:

all potential esters of C10HH5O3N2SCl and C13H10O4

IUPAC Name:

3-benzoyl-2-hydroxy-6-({[5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalen-1-yl]sulfonyl}oxy)phenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate; 4-benzoyl-2,3-bis({[5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalen-1-yl]sulfonyl}oxy)phenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate; 4-benzoyl-2,3-dihydroxyphenyl 5-oxo-6-(λ⁵-diazynylidene)-5,6-dihydronaphthalene-1-sulfonate

Test material form:

solid

Specific details on test material used for the study:

Storage conditions: ambient temperature (10 to 30 °C)

Results and discussion

Remarks on result:

not measured/tested

Particle size

Particle size 1

Percentile:

D10

Mean:

2.4 µm

St. dev.:

0.07

Remarks on result:

other: Individual results: 2.5 and 2.4 µm

Particle size 2

Percentile:

D50

Mean:

9.6 µm

St. dev.:

0.14

Remarks on result:

other: Individual results. 9.7 and 9.5 µm

Particle size 3

Percentile:

D90

Mean:

30 µm

St. dev.:

0.85

Remarks on result:

other: Individual results: 30.6 and 29.4 µm

Any other information on results incl. tables

Results
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= 9.7 µm; 2^ndtest series L₅₀= 9.5 µm
The average of the median particle size: L₅₀= 9.6 µm

The particle size L₁₀(D (v, 0.1): 105 of particle volume or particle mass with lower particle diameter) deduced from these distributions were:
1^sttest series: L₁₀= 2.5 µm; 2^ndtest series: L₁₀= 2.4 µm
The average of the particle size: L₁₀= 2.4 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= 30.6 µm; 2^ndtest series: L₉₀= 29.4 µm
The average of the particle size: L₉₀= 30 µm

The particle size distribution showed a polymodal distribution with a shoulder. The first maximum was seen at ca. 10 µm and the second at ca. 200 µm.