Reaction mass of 6-(2-ethyl-6-methylanilino)-5-(4-{4-[ethyl(3-sulfobenzyl) amino] phenylazo} phenylazo)-4-hydroxynaphthalene-2-sulfonic acid, sodium and/or disodium salt(s) and 6-(2-ethyl-6-methylanilino)-5-(4-{4-[ethyl(4-sulfobenzyl) amino] phenylazo} phenylazo)-4-hydroxynaphthalene-2-sulfonic acid, sodium and/or disodium salt(s)

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2007

Report date:

2007

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: part 5.2 Laser scattering/diffraction method

Version / remarks:

ECB/TM/February 1996

GLP compliance:

yes (incl. QA statement)

Type of method:

Laser scattering/diffraction

Test material

Test material information

Constituent 1

Reference substance name:

Acid Navy RN-2682

IUPAC Name:

Acid Navy RN-2682

Test material form:

solid

Results and discussion

Particle size

Particle size 1

Percentile:

D50

Mean:

< 11.4 µm

Remarks on result:

other: ultrasonication for 5 min.

Particle size 2

Percentile:

D10

Mean:

< 3.7 µm

Remarks on result:

other: ultrasonication for 5 min.

Particle size 3

Percentile:

D90

Mean:

< 31.3 µm

Remarks on result:

other: ultrasonication for 5 min.

Any other information on results incl. tables

The particle size distribution was found to range from ca. 0.5 to 70 µm.

Particle size distribution:
< 2.7 µm:  5 %

Applicant's summary and conclusion

Conclusions:

MMD is 11.4 µm.